Malicious PDF — malware analysis report

Static analysis result for SHA-256 5efe3ca60c190e09…

MALICIOUS

PDF

38.7 KB Created: 2020-08-18 17:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 38eb0f4f162b6f57047a7d434a6b937f SHA-1: 79c7fd567f38746c407c8fa505c20676600759a7 SHA-256: 5efe3ca60c190e09b35786effb65456a7405247dc5670a294dfe81e8bc6ba1b5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) identified as malicious. The document body and heuristics indicate a lure for users to download files, likely a phishing or malware distribution scheme. The presence of a malicious redirector and a large number of external links suggests an attempt to drive traffic to potentially harmful content.

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=amalgamate+pdf+files In PDF document text
    • http://files.crookedarrowpress.com/uploads/1/3/2/7/132740412/gawatunagot.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/1/0449/0254/7611/files/aulularia_testo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4452/8550/files/mid_night_club_cheat_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/62049052916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/5733674025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8362/8697/files/dfl_bundesliga_spielplan_2020_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6899/5224/files/ameloblastoma_histopathology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5900/9943/files/dmv_sample_test_ca_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1887/7085/files/tisit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7050/4608/files/shankarachi_aarti_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/pressure_gauge_calibration_by_dead_weight_tester.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 2

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_off00005a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7A 5256 bytes
SHA-256: 00989f3c41804d13725ef1db6cbcd67f6f706baf35f167fd2b0a47c5a09c5a5b
font_01_sfnt_off00006c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4A 10088 bytes
SHA-256: 627b12105c26dfee49d623a2edfbca23e086ed45eba0ca075efb057796a7ab1c

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