Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bab4bb5f3958973…

MALICIOUS

PDF

41.8 KB Created: 2020-08-08 23:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 153e1153baa4ae4b80fa662500b6af86 SHA-1: 446368498ba656f62d097296a90eddd730eae6b7 SHA-256: 4bab4bb5f39589736fa95302ed7a4f70a89436737b44f827532f367a807052c8
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to host further malicious content. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.ru/pify?keyword=fafsa+form+pdf', which is likely intended to lead the user to a phishing or malware distribution site. The document body text and embedded links suggest a lure related to 'fafsa form pdf'.

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=fafsa+form+pdf In PDF document text
    • http://didusin.wakecomedicalalliance.com/uploads/1/3/0/9/130969045/9749764.pdfIn PDF document text
    • http://sozasik.nataliecanderson.com/uploads/1/3/1/6/131636664/muduvivevufubuveji.pdfIn PDF document text
    • http://files.chefcappyskitchen.com/uploads/1/3/1/6/131606694/5942649.pdfIn PDF document text
    • http://files.studiosirishop.com/uploads/1/3/2/7/132740917/762a1.pdfIn PDF document text
    • http://files.tourofguam.com/uploads/1/3/1/4/131437311/442670.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/1/0432/3937/5012/files/wipanon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/fasuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5110/6972/files/54505380040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/teas_science_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/nimesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2564/4192/files/97051894316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/47102611811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2711/1841/files/bitwise_operators_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/70231427808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/61930012884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1466/8959/files/how_to_convert_to_word_without_acrobat_pro.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 8

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_off00006699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6699 5108 bytes
SHA-256: 54f9ff751687e37ff974242f5c82149414a10895c7fe0ab6f3ea22baef458b92
font_01_sfnt_off000077e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E8 10256 bytes
SHA-256: d7e1286c4e0a19fe3fc32846f509cbeba147146418914626f9ac479f346d900e

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