Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4a1cbf4d8d2fdb…

MALICIOUS

PDF

38.5 KB Created: 2020-08-10 17:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f728337e983984c95e8800672599a39a SHA-1: 82f8a329cda549d96d8c70cebb89e02e94e5009a SHA-256: 2e4a1cbf4d8d2fdb90bbf06f41a921fb1b468eb744e3af273286f8970a34a3dc
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link to 'ttraff.com' is identified as a malicious redirector. This suggests the document is part of an SEO poisoning or phishing campaign designed to lure users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=arap%25C3%25A7a+t%25C3%25BCrk%25C3%25A7e+hikaye+kitaplar%25C4%25B1+pdf
    • http://files.sidsherwin.com/uploads/1/3/1/8/131856041/piwiginadefe-gifovuro-vipijaxagired-xutefe.pdf
    • http://files.umnnavs.org/uploads/1/3/1/4/131454883/sawuxerativuzud.pdf
    • http://files.shunsart.com/uploads/1/3/1/8/131871854/wigaloraziforuviv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/pipekapefukopukodo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/zelilofeverosowomobad.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/fobizolugi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/26354843400.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/40006964266.pdf
    • https://cdn.shopify.com/s/files/1/0433/4511/7342/files/duxevezumudefav.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/vikigosaki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39806276645.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/zoduzowudiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/kalnirnay_calendar_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/ahmedabad_city_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0440/7066/6392/files/1-_99_farming_guide_osrs.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004974.bin
c01900ae15e4009d38d39be16dba2abd25719619da5dad7e32ddb936fa1310ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4974 5012 bytes
font_01_sfnt_off00005a9b.bin
293d6c2cefd23f77a2e769a8ba76a8fad61fd914dc4ca838a3c42f66c8850996		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A9B 10828 bytes
font_02_sfnt_off00007ca8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA8 4324 bytes

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