Malicious PDF — malware analysis report

Static analysis result for SHA-256 1934efe5da322eec…

MALICIOUS

PDF

36.9 KB Created: 2020-11-05 23:55:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5bdede28e89a07abd378cdfa3ecaf020 SHA-1: 779edb27aae62caf53027f922d3e1fbc8b0e6c10 SHA-256: 1934efe5da322eec254c0534a8b21ad8655ed49bd4c135b01574ef729a0cc9fe
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One of these links, https://traffine.ru/strik?keyword=medela+harmony+manual+pump, points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. No scripts were extracted, but the presence of multiple malicious links indicates a high likelihood of redirecting users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffine.ru/strik?keyword=medela+harmony+manual+pump In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5f8e3546efa43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f8b2faca64ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_5f95127dad2c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382784/normal_5f8b5af53e82c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f8a70237de41.pdfIn PDF document text
    • https://judunelikirolo.weebly.com/uploads/1/3/4/3/134375477/429ec4ee3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_5f97c2d7b3b5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389571/normal_5f9886e799cdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368481/normal_5f9396bbc0b64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5f905aace66d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_5fa321732af5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f877566229fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/2558376938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70579094-aab7-400b-827f-8541c854cd36/boxopiwufuxided.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5044 5128 bytes
SHA-256: 898e6af220d323d0fee0f8995e35fcb483d78f99805cd6dd0068229e8840dccd
font_01_sfnt_off0000619c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619C 11020 bytes
SHA-256: 3cb09b3dee1c40a22986cfc790cb25ca57bcb7d7ddae572d37dbeb39309b303c

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