Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f47947dd9ef229…

MALICIOUS

PDF

47.4 KB Created: 2020-11-01 13:03:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a7fd5115a8e15d2f47885e16e2b1dfce SHA-1: 3219791e9cc8ac2fb1d3211acfe8237a43d5bd56 SHA-256: 53f47947dd9ef229b91eac52a9ef2b7ed044497df48f090a1c990cbf64680947
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file functions as a link farm, containing numerous embedded URLs that redirect to external sites. One prominent URL, https://gettraff.ru/strik?keyword=diesel+pickup+trucks+with+manual+transmission, is flagged as a malicious redirector. The document's structure and the mass of links suggest an attempt to manipulate search engine rankings or direct users to potentially harmful content, aligning with a phishing or malicious redirection attack pattern.

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.
  • 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.
  • 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://gettraff.ru/strik?keyword=diesel+pickup+trucks+with+manual+transmission In PDF document text
    • https://bedakowunuva.weebly.com/uploads/1/3/4/3/134342711/9ebe635.pdfIn PDF document text
    • https://gezeteweni.weebly.com/uploads/1/3/4/0/134040803/cadf16aa7c15.pdfIn PDF document text
    • https://gaxasonazeg.weebly.com/uploads/1/3/4/3/134375181/rixowarelixawi.pdfIn PDF document text
    • https://kosemarenile.weebly.com/uploads/1/3/4/3/134315061/84489889dc.pdfIn PDF document text
    • https://tojopuxibo.weebly.com/uploads/1/3/4/2/134265943/dujefizawapiridon.pdfIn PDF document text
    • https://kudowelevuk.weebly.com/uploads/1/3/4/5/134585456/wogilirusaniregenuki.pdfIn PDF document text
    • https://nevonanopovew.weebly.com/uploads/1/3/4/3/134335048/105991.pdfIn PDF document text
    • https://kalabuzamebuku.weebly.com/uploads/1/3/4/3/134339718/puwupedul.pdfIn PDF document text
    • https://mujunoba.weebly.com/uploads/1/3/2/6/132682006/wepirorogekozuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5f91f99e175de.pdfIn PDF document text
    • https://tilawebaxipas.weebly.com/uploads/1/3/4/5/134576196/51daef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0715/3572/files/skyrim_adorable_face.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0301/8918/files/lolefaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a6b67e-e043-40b3-af9d-59e6552417d1/76670788042.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 3396 bytes
SHA-256: f617828148147f90b2ef361c8ce44bf4ab263353085c6c3af1b3d580807b3898
font_01_sfnt_off00006d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D84 5208 bytes
SHA-256: f0a381733147b038a8de31bc0d4bdd88b4119f56e967d83e0a6586b21c0b108d
font_02_sfnt_off00007f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F24 10240 bytes
SHA-256: 6b4962145780ea45f83372709603900d3cd1cd7494bfeb2badbca6508d1698ec
font_03_sfnt_off0000a1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1FB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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