Malicious PDF — malware analysis report

Static analysis result for SHA-256 733be81a9d61ade3…

MALICIOUS

PDF

50.4 KB Created: 2020-08-17 16:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb0d313634e7ac9af7079f062f2c6385 SHA-1: f9172fa3fcbe2dcd69d17c0840c001f6b9025588 SHA-256: 733be81a9d61ade373de368cdacadbe7b297330f5536c6eaeb6bde1538b7f84d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The document body, though heavily obfuscated, contains the primary malicious URL. The ML classifier strongly indicates maliciousness, and the heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/pify?keyword=bottomnavigationview+height+android In PDF document text
    • http://muxuz.faceeffect.shop/uploads/1/3/0/8/130813604/lepavusojulise_niropidesexiwoj_loluxodafi.pdfIn PDF document text
    • http://files.831.delivery/uploads/1/3/1/4/131438180/zafilarul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/37744872084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7048/7712/files/the_casebook_of_sherlock_holmes_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/fefajexepoxovixereloxewik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/3369448203.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0899/9072/files/36881053696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/bomafujuberurobedeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4419/9829/files/the_way_i_am_eminem_epub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/37714592229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/49218976921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/mefimu.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

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A13 5232 bytes
SHA-256: 7e2ab4f6147f295540a9691715172d164fb4e07bc6bb2f4418f85bb87466d18a
font_01_sfnt_off00008bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBE 15792 bytes
SHA-256: cf6127f5d72151ad59f26582e175ac6d9c200a04660335a2187ff12127073335

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