Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d36f6a4b7dea2d…

MALICIOUS

PDF

38.3 KB Created: 2020-08-08 22:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 073beaf46eabebf0253cdeafae574df2 SHA-1: 4013bda8c34712d2ca7e7afe9154203fa8921da2 SHA-256: 07d36f6a4b7dea2d7c9fea503a619ce4c6c26f5ede4dc70a5aace1458fd6f41a
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, but one critical link redirects to 'ttraff.cc', identified as malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking lure related to printable alphabet letters. This suggests a phishing or scam attempt where the user is tricked into clicking the malicious link, likely leading to a further stage of infection or a fraudulent website.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=large+printable+colored+alphabet+letters+pdf
    • http://files.rhythmicforce.org/uploads/1/3/1/0/131070212/bipuwegatu.pdf
    • http://files.simplyoakboutique.com/uploads/1/3/0/7/130775659/jofovagikomisaw.pdf
    • http://files.thattallredhead.com/uploads/1/3/1/4/131453194/ac4cab475f.pdf
    • http://pijobidiz.betterhealthyouthyoga.com/uploads/1/3/2/7/132712093/kizujoxafawilu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dogudanivivakow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40323832667.pdf
    • https://cdn.shopify.com/s/files/1/0437/0379/5865/files/antioxidant_activity_plant_extracts.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6374/files/wuponutebawowiro.pdf
    • https://cdn.shopify.com/s/files/1/0436/5916/5849/files/quick_login_facebook.pdf
    • https://cdn.shopify.com/s/files/1/0439/7599/9646/files/ks_state_abbreviation.pdf
    • https://cdn.shopify.com/s/files/1/0435/7344/4767/files/37165412428.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/thinkbook_13s.pdf
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/sefiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4343/0305/files/gozebukuviromaxile.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/38426515023.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_off0000584d.bin
5ed95019629febf753269a6ae23cbe99961395e8a1ec966a157952ac6392fcf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x584D 5496 bytes
font_01_sfnt_off00006af0.bin
f47c2ff2e8096f3231ee13e312dae24df7ec20242d88675f3ba60a19714d2b1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF0 9724 bytes

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