Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b65f8cfcc26893a…

MALICIOUS

PDF

85.3 KB Created: 2020-09-08 09:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 816e425bf8376d1cc3b2797725f9d993 SHA-1: 6e3d053fc93fb828f76b92299da158916cf7854b SHA-256: 5b65f8cfcc26893a973c5cc2a24a8c51cf098c584c90e2003c8930f484c38862
194 Risk Score

Malware Insights

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

The sample is a PDF document that contains a link to a known malicious redirector, identified as 'ttraff.cc'. Heuristics indicate it's an advance-fee scam lure, likely attempting to trick the user into believing they are receiving official court sentencing guidelines or a parcel delivery notification. The document body, though heavily obfuscated, contains the malicious URL. No scripts were extracted, but the presence of a malicious redirector and the scam lure strongly suggest a phishing or social engineering attack.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wix?keyword=magistrates+court+sentencing+guidelines+burglary
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a421e3_9f8a945aefb34a35b4e3a29932781ad2.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_9f8b8ef1175d41e9a6b752fc61987a1a.pdf
    • https://static.usrfiles.com/ugd/f65518_73c5723630524c6a8e948bed1b264488.pdf
    • https://static.usrfiles.com/ugd/144d27_057520a2f16c476eafeaade3663922aa.pdf
    • https://static.usrfiles.com/ugd/3283b0_88d75d5bce4b4297b711f17b1dfea270.pdf
    • https://cdn.shopify.com/s/files/1/0438/7920/2984/files/equilateral_triangle_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3026/files/cyber_hunter_apk_pure.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55079075607.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1585/files/51719604038.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/poe_chaos_recipe_filter.pdf
    • https://static.usrfiles.com/ugd/f1780b_2a0b623a84ff4f0c933378e59ce55b45.pdf
    • https://static.usrfiles.com/ugd/9cc572_8dd76fdd5b5342709fa1993bb77742f5.pdf
    • https://static.usrfiles.com/ugd/d1d005_e4646ca8ff0445fe8cb20542e5da0b9c.pdf
    • https://static.usrfiles.com/ugd/ac51ce_be4b7cd78a4b4ebd894e96c2491431d0.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_off0001138e.bin
fcbe8db39b2fd4bbef5cf3fa2707240d11c2b80b2a34469e62210fc704b4f2ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1138E 5352 bytes
font_01_sfnt_off000125df.bin
03fba7c2ba5f60717e2fc0669df23276ab9b66cf1cc511fcedc0e168fc07501b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125DF 9908 bytes

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