Malicious PDF — malware analysis report

Static analysis result for SHA-256 674161890f85b07d…

MALICIOUS

PDF

42.7 KB Created: 2020-08-31 23:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84f14c7e90a32ac7c9dc38df1b4ae3e8 SHA-1: 9f6f40355ab9c51d5fbbb7e7bc8b65df2b8a167c SHA-256: 674161890f85b07d596fe7af9ed525d84871f06b331b644149237cb10de0fe75
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and references to game mods, suggesting a social engineering lure. The presence of numerous other PDF links, many pointing to benign content, indicates a link farm strategy, potentially to obscure the malicious link or for SEO manipulation. No scripts were extracted, but the PDF structure itself facilitates the malicious 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.cc/wix?keyword=watch+dogs+2+mod+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_9626813987cf4cf2a2853db0e124cfbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89b70d13faa442ebdba2253dfcfa388.pdf
    • https://static.usrfiles.com/ugd/078c79_00d41d2a84114051a3422c00639209b0.pdf
    • https://static.usrfiles.com/ugd/3ce946_c688cc31577f4faab20efeb716de1bbc.pdf
    • https://static.usrfiles.com/ugd/b13fd1_f7fa7a6536bf4324b6266b140fdd40c8.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/jagowukorujokezo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5198/2754/files/amazing_grace_bagpipes_and_drums_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1566/5824/files/8557678173.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/how_to_format_discord_text.pdf
    • https://static.usrfiles.com/ugd/52b593_9a469957831548de93be551314484d68.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_13bfba529cca4994adcc966f3884e00e.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/54538096093.pdf
    • https://cdn.shopify.com/s/files/1/0435/1524/8794/files/22228853752.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/88675407078.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_off000067b3.bin
9179c37c6860bc4d4b2c2437d5292bd0ace3aaaded450cdc2cd56f7beff36383
pdf-font-stream PDF embedded font (sfnt) at offset 0x67B3 5464 bytes
font_01_sfnt_off00007a2c.bin
f1dc083c9142f89256895c01af92b7e2a557b5dad923272775e90866767e3f2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2C 10468 bytes