Malicious PDF — malware analysis report

Static analysis result for SHA-256 62869b8cb6246b2f…

MALICIOUS

PDF

44.6 KB Created: 2020-07-29 18:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2040a645a980414070e1d15b80f851d6 SHA-1: f48d1ccfe72222fceb7fe09bddb4305bad7603e1 SHA-256: 62869b8cb6246b2f9a03d7b931785dea4921ea4d273347ed23e39a60a739c5a7
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify domains, suggesting a link farm designed to distribute malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as the initial point of compromise. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=atkins+phase+2+food+list+pdf
    • http://files.evergreentrackingdogclub.org/uploads/1/3/2/6/132695575/04418dcfb4f4.pdf
    • http://files.tvtruck.tv/uploads/1/3/0/9/130969220/08eb56f48.pdf
    • http://files.nyteched.org/uploads/1/3/1/8/131871871/3439343.pdf
    • http://files.aaichstudio.com/uploads/1/3/2/6/132696117/tujero_mumozumaxejapid_wakiwosek_xubifipotud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/58687680344.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/zerefez.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7784/files/gamixoxoti.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/povixakoxasomodek.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/gukixesuneregezilunif.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/lobogumulelase.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2545/files/pisigowodebuvewere.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1155/files/37823720179.pdf
    • https://cdn.shopify.com/s/files/1/0427/8157/3279/files/54565310946.pdf
    • https://cdn.shopify.com/s/files/1/0440/6440/7702/files/rivudejibusabusadilak.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/87904178202.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/bisovubi.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_off000070ad.bin
7681bc370d6d3bc659eb3b6e1038d75995ababa9e72d521c25901856774b2a57
pdf-font-stream PDF embedded font (sfnt) at offset 0x70AD 5004 bytes
font_01_sfnt_off000081ac.bin
f581518fb591eba402ab9d0f2a9b0a75a8f1141712a6603778020c487ccacd88
pdf-font-stream PDF embedded font (sfnt) at offset 0x81AC 10396 bytes