Malicious PDF — malware analysis report

Static analysis result for SHA-256 f937efbbee38d980…

MALICIOUS

PDF

42.6 KB Created: 2020-08-14 02:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a0c0b7ef9d781cf7cd9a5c86e619d38 SHA-1: fde961b3db8a758669716c7876ebd456c1e4d9cd SHA-256: f937efbbee38d980ce296ae454706d8a22692c5f51c3d44a20262df3b6983a2f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'Ford annual report'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the final destination. The ML classifier strongly flagged this PDF as malicious.

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=ford+annual+report+apa+citation
    • http://files.bowcreekkennels.com/uploads/1/3/1/3/131381675/tuxefepezutudemes.pdf
    • http://buxeguwaw.lyssanda-designs.com/uploads/1/3/1/4/131408024/5159237.pdf
    • http://bimoburu.wilsonhypnotherapy.com/uploads/1/3/2/6/132681946/rujeragin_begosubonuwu_jozozuliduja.pdf
    • http://files.thecountrywrensnest.com/uploads/1/3/1/4/131407088/4080863.pdf
    • http://files.shoptexashospitality.com/uploads/1/3/0/7/130740367/ae443e.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/xewimedakufixemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/busan_korea_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5671/files/zakekigi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1749/files/kojidogizoxatitiwi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/fojetebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/catacombs_of_carthus_map.pdf
    • https://cdn.shopify.com/s/files/1/0436/1220/9314/files/developmental_biology_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8565/files/89029604897.pdf
    • https://cdn.shopify.com/s/files/1/0432/6945/6028/files/banofukog.pdf
    • https://cdn.shopify.com/s/files/1/0437/7647/5290/files/46113300806.pdf
    • https://cdn.shopify.com/s/files/1/0436/7086/4025/files/fexusozurerowimorep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/63236404362.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/
    • https://cdn.shopify.com/s/files/1/0427

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000662b.bin
5432455a5a3d2f45121c073801490c23dad43331cbd00a444b960d2aefbb3047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662B 4844 bytes
font_01_sfnt_off000076b4.bin
80a6bd7c562961d13ea202300829732fa79ac45783070360ae0f7da3b4c893b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B4 11764 bytes

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