Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bb3129a8d61eca…

MALICIOUS

PDF

62.1 KB Created: 2020-09-05 19:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f85beb1e71c9b203e939cdc777e23872 SHA-1: 7f43e0f729071ba42096634e5cacd5579121e4b6 SHA-256: 05bb3129a8d61eca52084a305c83c0b8c27c703042a46f15fde6a24b4dad4fb0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=vande+mataram+abcd+2+song++djpunjab'. This URL is likely part of a phishing or scam campaign designed to trick users into visiting malicious sites. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to obscure the malicious intent. 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.club/wix?keyword=vande+mataram+abcd+2+song++djpunjab
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3427/0101/files/free_online_javascript_formatter.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4337/files/explosion_green_screen_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/62437036292.pdf
    • https://cdn.shopify.com/s/files/1/0435/8720/7327/files/counter-_strike_free_1._8.pdf
    • https://static.usrfiles.com/ugd/b8c837_31acf244f30c48d9ba84016a7ceea100.pdf
    • https://static.usrfiles.com/ugd/b8c837_2986a01e740a42bebdd0852c6651dd67.pdf
    • https://static.usrfiles.com/ugd/b8c837_41401a2f0eea43b1b83d15ee84866c36.pdf
    • https://static.usrfiles.com/ugd/b8c837_61dc039615f94bcd81525e48d6b394d8.pdf
    • https://static.usrfiles.com/ugd/90423f_eed2a8e4106f49f687570ad373d41bba.pdf
    • https://static.usrfiles.com/ugd/b0c8dc_56ab181c8bb74d40b07701cf1b88a261.pdf
    • https://static.usrfiles.com/ugd/80c1db_7b3fe550959a4ea8ad09732b26cdc5a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb7b9ff53afe4665843893c2008d0bbc.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_off0000ab1c.bin
ab9f1bb2d53065664ffc76309f98d7e5d9b84fd392b00cb197aa752f2714e3c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB1C 5672 bytes
font_01_sfnt_off0000be59.bin
aa668be739448dfc581e9dc0d29c7e3095a8a87987e5c4f94da36625f66775c8
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE59 14312 bytes