Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4eedfd1c5d3c76…

MALICIOUS

PDF

58.3 KB Created: 2020-08-07 15:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e6cd845e360b22de83266c6ff46a244 SHA-1: d57f1659988c9e5516a6ca512a7fbe3dda8b3fac SHA-256: 6f4eedfd1c5d3c7639fcfe60ab048bad57e0e43b62d342bdb302b09ac02aafef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, includes the URL of this redirector, suggesting an attempt to lead the user to malicious content. The presence of a large number of external PDF links further indicates a link farm, likely for SEO manipulation or to host further malicious content.

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://ttraff.cc/pify?keyword=advantages+and+disadvantages+of+participative+leadership+style+pdf
    • http://files.rosemarieoakman.com/uploads/1/3/0/8/130813588/bamikunak_sipegugaluv.pdf
    • http://tiguxebov.theramblingblog.com/uploads/1/3/0/7/130775934/1190dd5c79.pdf
    • http://files.andcreation.ch/uploads/1/3/1/3/131380511/549399.pdf
    • http://files.wah28.com/uploads/1/3/1/4/131453022/xedogebezogetix-xejamuwi.pdf
    • http://files.pral153.co.uk/uploads/1/3/0/8/130813427/93b5f16c0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/6797/2513/files/27352102013.pdf
    • https://cdn.shopify.com/s/files/1/0434/1638/7733/files/fusionner_plusieurs_en_1_sur_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/jamipisamawaxevekatoxag.pdf
    • https://cdn.shopify.com/s/files/1/0435/8501/1871/files/cmc_rope_rescue_manual_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/4561/6792/files/case_files_pediatrics_5th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/jixaribezigekirufapasana.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/redinobositekos.pdf
    • https://cdn.shopify.com/s/files/1/0432/0077/4307/files/voltage_transformer.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2017/files/article_of_association_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/fejowudodimonin.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/bawirokibumefunorinuluf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7988/4186/files/jifaparunu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009810.bin
1757bf4e44ec550c8b176573ff8180ae188451b7e8d58a32ab9103b9b37f5894		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9810 5356 bytes
font_01_sfnt_off0000aa4f.bin
57c50dd104e6391236f33e2fbae0b18a304e8e93c4e045d294a155d4284a6446		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA4F 10180 bytes
font_02_sfnt_off0000cd10.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD10 4324 bytes

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