Malicious PDF — malware analysis report

Static analysis result for SHA-256 7caa812537816cf6…

MALICIOUS

PDF

74.0 KB Created: 2020-08-23 11:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8093bc165d5b81a2356b88bfd1f4e035 SHA-1: d606bdf7aa9c011c1fb1d1a2fe4b10d2184f165d SHA-256: 7caa812537816cf656df319fa3fcc5ddc9e7766847330a621a8c133453fb29e5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, with one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'perfect match taiwanese drama' and the authoring application 'wkhtmltopdf', suggesting a lure to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to distribute 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.com/pify?keyword=perfect+match+taiwanese+drama
    • http://bavakepa.sharingdiversity.com/uploads/1/3/1/8/131856887/1728083.pdf
    • http://jaxelel.phil-mann.com/uploads/1/3/1/6/131606758/961351.pdf
    • http://gomadurum.moherlegal.com/uploads/1/3/0/8/130874104/batiweb-sukakazobisune-tetefa.pdf
    • http://kozagu.capenewagenfarm.com/uploads/1/3/1/8/131856408/rojazuzo.pdf
    • http://vepulajam.sawdustinmycoffee.com/uploads/1/3/1/3/131378950/sunebot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2992/1943/files/badidajetolez.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/60543709264.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdf
    • https://cdn.shopify.com/s/files/1/0463/1756/8157/files/turewopetulogenoti.pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5371/files/96773165414.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/la_caccia_al_tesoro_camilleri.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/tigogaxinowuja.pdf
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/duvetobotadajinaduwe.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/answers_bible_curriculum_teacher_digital_resources.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.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_off0000a665.bin
75ce88fe3eff20a936ad42c3ee19c53fa8bb08ee7843334221874a41ddefcc65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA665 15884 bytes
font_01_sfnt_off0000d871.bin
758f137c0e8a8299a3f10e0e50adef9ae135d7079bf73bbf2b28c1ea9bd54282		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD871 5320 bytes
font_02_sfnt_off0000ea6a.bin
ba7d95297b56b79a828b9295b063fe652601cb5eea0fe85100fe63bea04121bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 15452 bytes

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