Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0963ea4d7841652…

MALICIOUS

PDF

44.1 KB Created: 2020-08-18 21:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7853461d1fce3e03a35a644d0b5e1ebe SHA-1: 76b7a8f32398623125d1f63c92c4af91a4b43890 SHA-256: a0963ea4d78416529662274695caa650bb30bc509b081f3dd15570159277f28c
202 Risk Score

Malware Insights

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

The PDF file contains a lure suggesting it is an email cover letter template, which is a common social engineering tactic. It includes a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, some of which are hosted on Shopify. The presence of a visual download button further supports the lure.

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.cc/pify?keyword=email+cover+letter+format+template In PDF document text
    • http://files.publishershaven.com/uploads/1/3/1/4/131406744/1ab589685fe7b92.pdfIn PDF document text
    • http://xopozepu.samueldongus.com/uploads/1/3/0/8/130814423/mukomilasume.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/1/0430/9562/1796/files/90890874768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/xitsonga_bible_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0558/9157/files/43575059212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/borizojerako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3963/7155/files/allahabad_high_court_order.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6862/8887/files/96822410594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/megeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/complete_subject_verb_agreement_rules_and_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7935/9900/files/batla_house_full_movie_khatrimaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/ensayo_de_la_pelicula_escritores_de_la_libertad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/nujovu.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 3

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_off00006d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6C 5000 bytes
SHA-256: 068611550e5ed1145f7050e007f7cd0bc6a5c921c0d56fe8da16af19449c0580
font_01_sfnt_off00007e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E60 10860 bytes
SHA-256: b11a926fec0aa0b464cd703a722ff4c9a92d38f06f5031219da53b87f15e13e8

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