Malicious PDF — malware analysis report

Static analysis result for SHA-256 78803cc7fae84076…

MALICIOUS

PDF

56.6 KB Created: 2020-08-29 17:38:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ccfc7608e02c10fa8a2dc97bc3049a1 SHA-1: caab3858ea8682e22f1954fc8ebd790415dee902 SHA-256: 78803cc7fae840763ccb04acd342f731e35e7606af7d7732b6abe6f1a46d6eed
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though partially garbled, includes the phrase '2004 ford f-150 Probleme' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous external PDF links, many pointing to Shopify, indicates a potential link farm used for SEO poisoning or traffic redirection.

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.com/wix?keyword=2004+ford+f-150+Probleme
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6365/6099/files/descargar_sorry_justin_bieber.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/ambrogio_l60_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/8924325696.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/60596939927.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/tuxiwusasiw.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_89ee5edd962e443198cc2d134073bb4b.pdf
    • https://static.usrfiles.com/ugd/e8506d_d03254b7d35348e5b086b1860b1ca9cd.pdf
    • https://static.usrfiles.com/ugd/79e0dc_2022c222367340abaf81007420c4907d.pdf
    • https://static.usrfiles.com/ugd/2c608b_1140dc4f40ec407a8223a85f67de0664.pdf
    • https://cdn.shopify.com/s/files/1/0434/8330/0005/files/66751167202.pdf
    • https://cdn.shopify.com/s/files/1/0435/5427/5479/files/15652687088.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/62052645578.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_off0000a126.bin
7a65611a48b8e68af5feb1c05f86d76ff63179352119c5332eeaddf60f9824b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA126 5376 bytes
font_01_sfnt_off0000b36c.bin
df7f1fca43cbddca3d82a6aee72398f2e6d2fb6234903be0adf12b17db8b3213
pdf-font-stream PDF embedded font (sfnt) at offset 0xB36C 9980 bytes