Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b623a32fe97622…

MALICIOUS

PDF

43.6 KB Created: 2020-08-11 06:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c11fecc4aae02adedee5e79dc6c80075 SHA-1: c8ec62c01322a0d04fd8f4d8cebc6593e2d4913c SHA-256: 69b623a32fe97622528cf60ee4c904ce905f8b234348a06ed6e7b53d823a5561
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a popular e-book, suggesting a phishing or malware distribution attempt. The presence of many Shopify links, some flagged as benign and others unknown, indicates a link farm strategy to obscure the malicious destination.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=david+walliams+gangsta+granny+pdf
    • http://files.shortattentionspanquilting.com/uploads/1/3/1/6/131637881/tidif.pdf
    • http://files.curlyhorsevermont.com/uploads/1/3/0/8/130874109/13e52e.pdf
    • http://files.beachcitywindows.com/uploads/1/3/0/7/130739684/1d88a89ba52d07.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4339/7525/files/artificial_intelligence_in_digital_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0437/0166/5960/files/stanford_acceptance_letter.pdf
    • https://cdn.shopify.com/s/files/1/0437/4321/5767/files/lamumuzidok.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/71176421411.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75815848510.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/sivis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1412/files/durisekonapewofax.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/cambridge_a_level_physics_past_exam_papers.pdf
    • https://cdn.shopify.com/s/files/1/0437/4013/5575/files/abraham_maslow_hierarchy.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/wixiraroxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/52263670023.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/analisis_bioclimatico.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_off00005ef2.bin
d5977494711908317dab8d190a05084bc7305a79cb382cf9b968d7af863c2e26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF2 5176 bytes
font_01_sfnt_off00007080.bin
2a4da4046f91cb2b06097081bbfc0b980428d6e9854c94aafca2dc283e96f931		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7080 10120 bytes
font_02_sfnt_off00009333.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9333 4324 bytes

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