Malicious PDF — malware analysis report

Static analysis result for SHA-256 116fe5d9d5db7ae0…

MALICIOUS

PDF

33.6 KB Created: 2020-08-30 20:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48017ec22f95a8966d73631476368018 SHA-1: 6214fa658b6b86c8defd9e09a0c9ec71b487f309 SHA-256: 116fe5d9d5db7ae0517d429015f9ee8c63d9e1aebdd82dc46191a8261d1099fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a redirector service, which is a common tactic for distributing malware or phishing pages. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a vehicle manual. The presence of numerous external links, many pointing to PDF files, suggests a link farm or SEO poisoning attempt to increase visibility and clicks.

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.link/wix?keyword=1999+honda+fourtrax+300+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/430cb2_d3c6829d4676493bab04bde593db9b9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_59962bd600ad464d9eb0dc9e5e75b475.pdf
    • https://static.usrfiles.com/ugd/b8c837_93d65f0bb7244ba693c62d5be9983a4c.pdf
    • https://cdn.shopify.com/s/files/1/0464/0669/7115/files/wosogizisovixel.pdf
    • https://cdn.shopify.com/s/files/1/0435/1731/3178/files/arteriovenous_malformation_colon_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0432/8541/4056/files/emetophobia_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89691c8310846be9834a7ea135f739c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7746f27624a447689928a2356cdaa579.pdf
    • https://static.usrfiles.com/ugd/b8c837_d955ac929c9a403996eb6f51d1bd0fc0.pdf
    • https://static.usrfiles.com/ugd/07625c_f7baff563dcf48099af63ec72f2bafde.pdf
    • https://cdn.shopify.com/s/files/1/0429/6690/9081/files/gugobobubisuku.pdf
    • https://cdn.shopify.com/s/files/1/0447/5843/3943/files/farmacos_antagonistas_h2.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_off00004711.bin
4d0767c7fddcf00cbc43787fee6bf458a583172172d42d36fe768d236a928741
pdf-font-stream PDF embedded font (sfnt) at offset 0x4711 5456 bytes
font_01_sfnt_off0000596d.bin
d1bbaf7070ee85d50264a74a3abdaf6fc2a7bdb9737064195a1872659b331fb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x596D 9556 bytes