Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3838aca7b8e451…

MALICIOUS

PDF

50.4 KB Created: 2020-08-04 04:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94dd2030902ff73a97ffc7a58bbc6de7 SHA-1: c0a71f2d4eeb03fc02d0348b76113b08d4946216 SHA-256: 5a3838aca7b8e451e7e79ce595d01600338be13d9e93fa897f49ab8737e941b0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body and embedded links also point to a large number of external PDFs, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.com/pify?keyword=sorting+algorithms+pdf+in+c, which likely serves as a gateway to 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.com/pify?keyword=sorting+algorithms+pdf+in+c
    • http://files.pagesofloveblog.com/uploads/1/3/2/7/132740458/5452894.pdf
    • http://mutob.recherchescepters.com/uploads/1/3/2/7/132740892/lavufolejagasabepew.pdf
    • http://files.studio25nh.com/uploads/1/3/1/8/131871721/kaxepotenipi_mavubafixigat_fapese.pdf
    • http://files.teachlearnconnectfcs.org/uploads/1/3/0/7/130775192/futipodexumota_nawewinafida.pdf
    • http://files.animalclinicofchardon.com/uploads/1/3/1/4/131453136/xezunijo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/77892191374.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/21756263293.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/11081728646.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8989/files/linux_export_command.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/2845228931.pdf
    • https://cdn.shopify.com/s/files/1/0440/8508/4310/files/56388458740.pdf
    • https://cdn.shopify.com/s/files/1/0434/2530/0647/files/lunebotirabevitedegefem.pdf
    • https://cdn.shopify.com/s/files/1/0433/6133/7498/files/fallout_new_vegas_geck.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/fuxobiwetudufix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/pijupezowokinebow.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/bixiludigajajazoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/kutize.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_off00006974.bin
82f9be2a39cf58fce39c6fc6b7bb71c13cca697a46eb7e1d3f3ebf9f1c187790		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6974 5344 bytes
font_01_sfnt_off00007b5b.bin
7cc3a42738d400d7215e0eecc287b697a2fcba5c9fa00d465dc21576f06e9b44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5B 16516 bytes
font_02_sfnt_off0000ae98.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE98 4324 bytes

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