Malicious PDF — malware analysis report

Static analysis result for SHA-256 089dae4e303ae257…

MALICIOUS

PDF

36.2 KB Created: 2020-10-12 07:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 865f63b5fa42f42fd4f9200ed33b8a1b SHA-1: 71c64d459ee185f46157d8536766caeaaef88c24 SHA-256: 089dae4e303ae257727d3e915e91994502902f7a2844e7e60200ecb4ba2a1e74
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a large number of embedded links pointing to disposable hosting, indicative of a link farm designed to distribute malicious content or facilitate phishing. The presence of a link to known malicious redirector infrastructure further supports this. No scripts were extracted, and the document body is heavily obfuscated, but the heuristics clearly indicate a malicious link distribution pattern.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.link/pify?keyword=waldwick+high+school+staff In PDF document text
    • http://files.anbinhgallery.com/uploads/1/3/1/4/131437889/e9d3a69.pdfIn PDF document text
    • http://files.dowhatyoulovenyc.com/uploads/1/3/2/6/132682739/2a11a.pdfIn PDF document text
    • http://files.splendiferousart.com/uploads/1/3/0/8/130873860/nexevel.pdfIn PDF document text
    • http://gorej.medinfokit.com/uploads/1/3/0/9/130969542/b3df2d97.pdfIn PDF document text
    • http://files.tigardblast.com/uploads/1/3/2/6/132696018/68c460fd31.pdfIn PDF document text
    • https://site-1038694.mozfiles.com/files/1038694/xexelaxakikimim.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/govaxegekezituzugefup.pdfIn PDF document text
    • https://site-1038309.mozfiles.com/files/1038309/gimowaparovexexepoko.pdfIn PDF document text
    • https://site-1041932.mozfiles.com/files/1041932/nojipenujedemefu.pdfIn PDF document text
    • https://site-1038378.mozfiles.com/files/1038378/8324473672.pdfIn PDF document text
    • http://files.funkyoctopustravel.com/uploads/1/3/0/7/130740187/favenedefomaxipusi.pdfIn PDF document text
    • http://sunew.ugranitesandcabinetsmore.com/uploads/1/3/1/4/131406390/5101701.pdfIn PDF document text
    • http://karale.indyallergyasthmaspecialists.com/uploads/1/3/1/3/131380213/vezixakubegib.pdfIn PDF document text
    • http://files.dvmetalart.com/uploads/1/3/0/9/130969746/xekil.pdfIn PDF document text
    • http://files.portraitsbyroyce.com/uploads/1/3/1/4/131437418/9749ec6e3be996.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4C 5356 bytes
SHA-256: a568b2a9362fdec42ae638b8658c817687086645076c264b321d196e1442bba3
font_01_sfnt_off00005e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E93 11012 bytes
SHA-256: 39d29587b26c8d2268356ceba78daf025d4b16a5d32d5f7f25fbb18c2f5a4bf9

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