Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02eb34776c630dc…

MALICIOUS

PDF

56.8 KB Created: 2020-09-01 10:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b97d91ed457629b8929238fb4dbb5909 SHA-1: 715b4c96b9c17af05dcdf5a91ac59eba47d32789 SHA-256: d02eb34776c630dcdfe4a77aaa0c737046e7b1c0abb96a82ea22cf4f4e50a448
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL and appears to be a lure for a 'maths practice book for class 4 pdf'. The file also contains a PDF link farm heuristic, indicating a large number of outbound links, many of which are to benign Shopify domains, but the primary redirector is malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=maths+practice+book+for+class+4+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/902d29_eb36eb9d387d410cb3a51274ffa4af45.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_29d3032025114b37a63b1c20dcdd4ee5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/de02f3_e8713a1549e440e3862d5bffa1acf363.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2274a7_22634792e931425faf613c69f97da86b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9631/7845/files/convert_to_word_online_using_nitro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4591/0678/files/firikavasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/4180/0601/files/sumitomo_sa1200_load_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/xurigixigaraxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/kozowudiruwenoxiwiza.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/538d67_c799a940362e47b8821986d549bb34f1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/72216b_9ac8dd257b66495098fab80a5b969842.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9b33c5_4b46f01e9e67495b976d63131444451c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0e2875_7dffb56566db49128d8349eeae04d2e2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c8a981_fd2b3024b84c4a40a1341764a9b446c0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/99a8f2_89051253f99542368a3671bf3b879f5b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c8a981_c83b6b7625944773b79b8ecc4ab196cb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/314c35_c2246af949964d62af9a1641cb41e59e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/74a852_572dab088b3f4ca79ebdeeaed65fd055.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4dd980_7386ed91f4cc4023bdbb3bb66eef3cc6.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7082 5540 bytes
SHA-256: 00a55655d8b1c7c892264ad32d5d8baeb805811f52cf8280420d1f08beeb8c82
font_01_sfnt_off00008353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8353 7536 bytes
SHA-256: 4197522ca16eaf86767828114e8715a35dcc2fa599e83d4cc7b3785d85c682e5
font_02_sfnt_off000098b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B4 10232 bytes
SHA-256: 4be3e8b2d3fe5b9b85d32c1664d1ca466259020a29780907d0c14d5cd171b1be
font_03_sfnt_off0000bbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB3 17492 bytes
SHA-256: c1e6ffc75750c5739b28184ea098192487e1c360ff13057a509a4a6bbbe05e79

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