Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3cfe193c102988…

MALICIOUS

PDF

35.1 KB Created: 2020-08-20 16:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd6e8f5bac93f3c6433bc33eb90b91a7 SHA-1: 2ef7e79a08e99c7327665876bdfc9359161c905e SHA-256: 6f3cfe193c1029884475e94f4750f9792466960d5db4c38c1ba7333e8942a394
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many pointing to Shopify, indicates a link farm strategy, likely for SEO poisoning or to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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=kaabil+full+movie++in+telugu
    • http://files.diviningbeauty.com/uploads/1/3/0/7/130740561/9036927.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/videxetisusajipot.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/hopewell_township_nj_police_reports.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/uttarakhand_police_bharti_2019_online_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/26629226061.pdf
    • https://cdn.shopify.com/s/files/1/0441/2204/6616/files/stock_market_trading_platforms.pdf
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/ski_report_ellicottville_ny.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2867/files/wenodewoso.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/rivaxasutuwegolikosagu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/tim_robbins_martin_lawrence.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/78310928905.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/34183296051.pdf
    • https://cdn.shopify.com/s/files/1/0438/1766/4674/files/biological_physics_nelson_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/73587680839.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_off00004c62.bin
cc42e91ec16ca5cf496b0d10a3e259fb628c53f65e70d573203a8909c41805ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C62 4980 bytes
font_01_sfnt_off00005d5c.bin
21d7c463be1df6a9f2f25f2f4f0d1bb33ca66d30baa041d43ad5418a29ee3af9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5C 10072 bytes