Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1565aca87c425d…

MALICIOUS

PDF

45.5 KB Created: 2020-10-04 15:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a929cf6bf6c850075322e7832ff9338b SHA-1: ecafefd0a02c6f5f8aae3a12e04379bb5afe4a94 SHA-256: 3d1565aca87c425d55ccbafc85ddab39c40101bf25fd1aab08e2a4fedc3a7552
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting and appear to be part of a link farm. One prominent URL, https://cctraff.ru/pify?keyword=fallout+3+patch+windows+10, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Fallout 3 patch windows 10', suggesting a lure to trick users into downloading potentially malicious files or visiting phishing sites. No scripts were extracted, but the extensive link farm and redirector indicate a clear intent to distribute malware or phish for information.

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://cctraff.ru/pify?keyword=fallout+3+patch+windows+10 In PDF document text
    • http://files.friendsint.org/uploads/1/3/1/4/131408027/napifezofeg.pdfIn PDF document text
    • http://files.greenfielddevllc.org/uploads/1/3/2/8/132814439/3ad43ac93043.pdfIn PDF document text
    • http://files.emmalouisetinniswood.co.uk/uploads/1/3/1/4/131437308/9814362.pdfIn PDF document text
    • http://files.smgengr.com/uploads/1/3/0/7/130775275/40613e874c1.pdfIn PDF document text
    • http://files.sandradeanfineart.com/uploads/1/3/1/0/131070590/6065157.pdfIn PDF document text
    • http://files.beautifulshares.com/uploads/1/3/1/3/131381900/93c68.pdfIn PDF document text
    • http://mexez.stu-acpa.com/uploads/1/3/0/7/130739267/0ce4cf4fa.pdfIn PDF document text
    • http://files.miles7one.com/uploads/1/3/1/4/131482859/7105557.pdfIn PDF document text
    • http://files.jeffreyscottsalsbury.com/uploads/1/3/1/3/131380094/8cbdb3684.pdfIn PDF document text
    • http://files.k-sportsmassage.com/uploads/1/3/2/8/132814989/5729859.pdfIn PDF document text
    • http://files.vegas3dkids.com/uploads/1/3/1/0/131069934/8570453472e89.pdfIn PDF document text
    • http://files.keepupwiththekeys.com/uploads/1/3/1/8/131856290/rolobanewazele.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_off00007401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7401 5468 bytes
SHA-256: ddace39b5c5e7d320dd5c0e85d7e5852deaed16035fb1946319c22721cb3d2ea
font_01_sfnt_off000086b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B1 10284 bytes
SHA-256: a8306dc30d8737b8de74d462b32a2acc6c8563556baf7e5422141015dcd5b65d

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