Malicious PDF — malware analysis report

Static analysis result for SHA-256 38999fc5223a26af…

MALICIOUS

PDF

36.7 KB Created: 2020-07-29 11:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 966e15a3e24d8475f58656be8f969847 SHA-1: 78efead9b106cf86c1c683bf22d8cbcde0290e65 SHA-256: 38999fc5223a26afa9c063a48b1c1deb6afb9cdae49035a19854e61759b4a713
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This indicates the document's primary purpose is to lure the user to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous external links, suggesting a broad distribution or SEO poisoning tactic. No scripts were extracted, and the document body was heavily truncated and unreadable, limiting further analysis of the specific lure.

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.cc/pify?keyword=exercice+cellule+animale+et+v%25C3%25A9g%25C3%25A9tale+pdf In PDF document text
    • http://files.gallatinmontessorischool.com/uploads/1/3/2/6/132695828/pijemejo-wudovigimo-lurezupiku.pdfIn PDF document text
    • http://files.barnummassage.com/uploads/1/3/0/7/130776257/5056992.pdfIn PDF document text
    • http://files.bishopsstortfordjudo.com/uploads/1/3/1/6/131608016/vogeletuxu.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/1/0430/3018/4098/files/69331040603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/wenutudaweko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8170/9206/files/81189287263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2154/8194/files/wujafivijijinok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1671/5429/files/dusofivib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4242/1398/files/mikudafazunodupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/12035406071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/53526756408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/fuwapasukujelusavopivoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0711/4391/files/pilofafaxumevuropet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/48855160265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/pejibimevukezupev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/wigonovibunibijuka.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 7

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_off000053d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53D2 5296 bytes
SHA-256: 574f0c74f3c2146079490074277d1cb9a9ca4a3f832d1d6b122ddadb9bab5ee7
font_01_sfnt_off00006580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 8976 bytes
SHA-256: 455fe96fc70a2dd9c122af0e6ae8990175842cae0136bbdecfbe7ac68c7221f8

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