Malicious PDF — malware analysis report

Static analysis result for SHA-256 779fb1cbb4b1ce1f…

MALICIOUS

PDF

48.6 KB Created: 2020-11-08 13:53:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 04494eae5a9bb817e61422b3b3989cc8 SHA-1: 70b3b5f5cfc36281262fa31c1c419e2385b6d435 SHA-256: 779fb1cbb4b1ce1fe71023f922a65663ae1fb2331458422524f89236be392f95
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffine.ru/123?keyword=brace+map+ideas'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/123?keyword=brace+map+ideas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f87612544926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5fa57d51b5ccd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403119/normal_5fa08381ad80d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372105/normal_5f97fda835ce6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450731/normal_5fa07e4cbdf0f.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://s3.amazonaws.com/bidurudilidujug/sonuvixenoxinezepaner.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/17094293394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d934edd-9c8b-4297-83ef-57d114621058/troop_committee_challenge_training.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/african_proverbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64add4a9-97ad-4ee6-bcfa-b6f8fab3c4cd/zobagumi.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/retixukuviziwinasubevute.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/surelixovirone.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/omega_masticating_juicer_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/omnisphere_2_cracked_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/gen-tran_30_amp_manual_transfer_switch_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/reduce_size_mac_quartz_filter.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DA 4728 bytes
SHA-256: 51138d68ff117b26a86abf6a263ecd428ce050f8453a86f3b36857c5c066e3a2
font_01_sfnt_off000082d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D7 10572 bytes
SHA-256: d88f0cb0982c0fd9a8afe6e2bec6a2bfbcad9ad651e748ef26838316bee1aef4
font_02_sfnt_off0000a721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA721 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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