Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e9e59f7a0cb84f…

MALICIOUS

PDF

52.5 KB Created: 2020-08-09 03:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d27427cde2fddbdb6d8792f596c9f253 SHA-1: 87a98003b8af588867ff439bf810e4259c5213e3 SHA-256: 94e9e59f7a0cb84f8026079a23a623594e2e8c41033fa90c40ffce0f60a6d622
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to ttraff.com, a known malicious redirector. The ML classifier strongly indicates maliciousness, and the PDF structure suggests an attempt to lure users to malicious sites by disguising them as legitimate 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.com/pify?keyword=barristan+selmy+chapters+winds+of+winter+pdf
    • http://gagafon.liquidlightbodyworks.com/uploads/1/3/1/3/131398020/gimem.pdf
    • http://files.karenrosasco.com/uploads/1/3/0/7/130739490/mixure_riranumovizo.pdf
    • http://files.ssimovement.org/uploads/1/3/0/9/130969330/giratopemowim_xugulusilafa_ranorewexijan_fipikudomevi.pdf
    • http://files.renibickelyoga.com/uploads/1/3/0/7/130739918/penapozonogil.pdf
    • http://files.yoyomamadesigns.com/uploads/1/3/0/9/130969312/xavezitorepugi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/9379502144.pdf
    • https://cdn.shopify.com/s/files/1/0434/5243/2537/files/ayushman_bharat_hospital_list_ahmedabad.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/mumbai_building_bye_laws.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/vanev.pdf
    • https://cdn.shopify.com/s/files/1/0439/3834/9211/files/12_monkeys_season_1_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0436/5117/0457/files/zexanebilugikuzarod.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/zerijidowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/sigoxotepabujumitezutimi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/34699318827.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/json_file_comment.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/pirates_of_the_caribbean_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1846/files/30933721946.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/80629015835.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008fad.bin
00d4f6950a1df3fc454e521f344e2f9c193407b8159a57af0eddd046935d0348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAD 5640 bytes
font_01_sfnt_off0000a2c8.bin
d6faae911915569eea916e89c9d4dfb245d456c6faa4e239d1531a68aa3be1c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C8 9884 bytes

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