Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9b60b989854bc9…

MALICIOUS

PDF

40.8 KB Created: 2020-08-11 18:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 194264ef76059fe32b05d13ab930faaf SHA-1: 66499dd9a33de790872ad25736e3924329d78e57 SHA-256: fe9b60b989854bc9729e48e9353a8fdf3340c60c3be13c8079f69b83e9b50a0c
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are SEO-optimized and point to PDF files. One of these links, https://ttraff.cc/pify?keyword=probability+density+function+questions+pdf, is identified as a malicious redirector. The document body, though heavily corrupted, contains this same malicious URL, suggesting the primary intent is to lure the user into clicking the link to access potentially malicious 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.cc/pify?keyword=probability+density+function+questions+pdf In PDF document text
    • http://files.maintx.net/uploads/1/3/0/8/130813866/82864a18.pdfIn PDF document text
    • http://files.thrivelakecounty.org/uploads/1/3/2/7/132712623/9742175.pdfIn PDF document text
    • http://xewop.inspiredcreationsbysky.com/uploads/1/3/1/3/131381679/1613185.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/1/0430/9018/2304/files/36798564503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5297/2697/files/contract_addendum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/motegakixesuxaxalurit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/60759387692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/the_anarchical_society_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/awards_and_honours_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/edit_online_free_add_pages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/kenorixavukuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/wirikefevaduxajugojabat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/41726973696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/how_to_reduce_belly_fat_exercise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7875/4199/files/zerap.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_off0000609e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609E 5516 bytes
SHA-256: 7f624d1753f4b02ec9d1d8a0bb3800fed376af1352a73ef9bd969677a76dbb2e
font_01_sfnt_off00007366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7366 10236 bytes
SHA-256: d1886c87375eca815cc33d86728cb76d44aefc1f7323dd68c0e946cee34fe053

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