Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe00fb211af5ec5…

MALICIOUS

PDF

43.0 KB Created: 2020-08-10 21:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 232bbee5cf43862d1e99b23aa00488c3 SHA-1: cf7a7a451235cbee3420e29d463d71dcaa1b7f3d SHA-256: 0fe00fb211af5ec53bf2a5a37d1883511f665bbf778221fbe87df4f5da7f588c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting seemingly benign PDFs, but one critical link directs to a known malicious redirector. This suggests a phishing or scam attempt designed to lead users to malicious content. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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=anatomy+trains+pdf+espa%25C3%25B1ol
    • http://files.dundrodchurch.org/uploads/1/3/2/8/132815365/kuworisuzokivuziw.pdf
    • http://files.clairefrancessullivan.com/uploads/1/3/0/8/130873791/9132233.pdf
    • http://files.desmoinesmarina.com/uploads/1/3/1/4/131408798/bowovalejikike-sofavo-zafukifel-zukubodekad.pdf
    • http://files.goldentreasureconsulting.co.uk/uploads/1/3/1/3/131383613/xuwadekatigivesafawa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/kqed_voter_guide_2016.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/behringer_xenyx_802_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/dukupegerulu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/ruseniga.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/lodelakixasuruxagaxonope.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/188260157.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/runitewunuwibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/american_pie_watch_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/9664/5538/files/can_t_hear_anyone_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0432/0860/5859/files/9092961026.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55781022724.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4317/files/jinupiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/pirojavadalogaparaguta.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066e0.bin
87fa18786aaf6f59a79cc4e3fdcf7c76e48ac4a09fdb2161334c9652d44dad34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E0 5492 bytes
font_01_sfnt_off0000793a.bin
a08d2f4acfd081ef1cc4b506248a67060d27a237f0e8241c406da9feb2132e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793A 10660 bytes

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