Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1dcf2b229a181ea…

MALICIOUS

PDF

116.7 KB Created: 2020-08-30 22:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f3e1d68dcdb53edc4ac60dbc49e6b65 SHA-1: 51fbd0cb8dd650acef635dfdf0830361081ad5e7 SHA-256: c1dcf2b229a181ea26f798e4958086a2c14c2efa5b2b6da87f9443109c4047a5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF document contains a prominent link that, when clicked, redirects to a malicious URL identified as 'ttraff.club'. This URL is flagged as a malicious redirector. The document body text also contains this URL, suggesting it's the primary lure. The presence of a large number of external PDF links, many pointing to Shopify, indicates a link farm SEO tactic, likely to obscure the malicious redirector. No scripts were extracted, but the PDF structure and embedded URL are sufficient to determine the attack pattern.

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.club/wix?keyword=download+avengers+endgame+full+movie%252A%252F+--%253E%253E%2527%253E%2527%253Cvvv000006v019771%253E
    • https://cdn.shopify.com/s/files/1/0436/4759/8742/files/pathology_book_for_bhms.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/point_slope_to_standard_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6924/files/asvape_michael_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6033/8586/files/ccna_voice_sybex.pdf
    • https://static.usrfiles.com/ugd/4dd980_cb304e73649f461abaf19093ebdd92e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_15b281b7a1174926accdf296b76d35f8.pdf
    • https://static.usrfiles.com/ugd/74e905_b38b24be33af458f81b76eadb2677bb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1a85a9cf1094f1186ccc391cb7bf560.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pegofegomena.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1044/files/74751332169.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/ziwilajobegitas.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001741d.bin
cb50c5edf317112dac0bcb4e8aa8ac0abd57a8403793af9077111b19af9d8603
pdf-font-stream PDF embedded font (sfnt) at offset 0x1741D 5592 bytes
font_01_sfnt_off0001875e.bin
811511e96d1bc89d953fd6b4341f16e973d15109eec7208a579be00025cfc7ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x1875E 11096 bytes
font_02_sfnt_off0001ad6d.bin
22e3e10deeaac3c7bbfa67b3395ed5ed86f37376f0a9cdcd8daefa718ba14e1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD6D 16952 bytes