Malicious PDF — malware analysis report

Static analysis result for SHA-256 875ee9e959c44a21…

MALICIOUS

PDF

34.8 KB Created: 2020-08-10 03:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9384bad3a324091b3a931f4ced5d1a8a SHA-1: 6196de1c25c80cd0f29fcdfbc9a8215f87b285bf SHA-256: 875ee9e959c44a21532249215ac0d3321e16bfdcf1c464e8e69e7206ef2e2694
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.ru/pify?keyword=laboratorio+caida+libre+pdf', is flagged as malicious. This suggests the document is designed to direct users to harmful infrastructure, likely as part of a phishing or scam campaign.

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.ru/pify?keyword=laboratorio+caida+libre+pdf
    • http://files.archibalddentalassociates.com/uploads/1/3/2/6/132682585/tasigidilut.pdf
    • http://files.lasalleyouth.ca/uploads/1/3/0/7/130775393/5123828.pdf
    • http://files.jessicaleeman.com/uploads/1/3/1/3/131381363/84b0ddd.pdf
    • http://kanago.ablackrose.org/uploads/1/3/0/8/130874474/texaw_kidunaxuja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/54395281316.pdf
    • https://cdn.shopify.com/s/files/1/0431/3359/9893/files/ziladabewi.pdf
    • https://cdn.shopify.com/s/files/1/0448/1653/1617/files/general_cognitive_ability_test_telkom.pdf
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/pimatapimexijosopug.pdf
    • https://cdn.shopify.com/s/files/1/0430/2215/5930/files/80162051031.pdf
    • https://cdn.shopify.com/s/files/1/0439/2671/6584/files/84011873204.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0904/files/sepuweb.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/fozubomijezaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/tigezemazeletebuwedoko.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6975/files/aachen_travel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/webmail_wfhc_org.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/9037317801.pdf
    • https://cdn.shopify.com/s/files/1/0438/5888/6806/files/53181747449.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0933/files/kenmore_heavy_duty_70_series.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/kigogi.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_off00004cc2.bin
ff08dbd9668b9b3e9e1540bbe57395b8e563db81a6a8036a74a6a004cde9e77a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC2 5052 bytes
font_01_sfnt_off00005dfa.bin
10b68efe2223e5ba761ef9a34c122b360675040138f2ff0ed89100b0a21de5e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFA 9764 bytes

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