Malicious PDF — malware analysis report

Static analysis result for SHA-256 10964890ad92503e…

MALICIOUS

PDF

39.9 KB Created: 2020-08-08 08:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6b658957f76ba928879e151e519b912 SHA-1: 64aa5c1d8551a8224c84c34b7e159cc224091f0d SHA-256: 10964890ad92503ed79224c72fb365b0e44d43be30b2550e94e502d912149286
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://ttraff.cc/pify?keyword=asset+management+business+plan+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating an attempt to lure users to malicious infrastructure under the guise of an asset management business plan.

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=asset+management+business+plan+pdf
    • http://dixej.bisonsbikes.com/uploads/1/3/2/8/132814930/vovikutukasad.pdf
    • http://files.judyatraveny.com/uploads/1/3/1/3/131398134/8c242.pdf
    • http://files.bamabreddoodles.net/uploads/1/3/0/8/130874691/pagojovigarurem.pdf
    • http://files.discover-slovakia.eu/uploads/1/3/0/9/130969791/565f86a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4745/0784/files/11637745964.pdf
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/67429759230.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/71470630783.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/97709839358.pdf
    • https://cdn.shopify.com/s/files/1/0432/2541/5843/files/garrys_hood_auto_clicker.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/a_beginners_guide_to_investing_ivy_bytes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/74857113401.pdf
    • https://cdn.shopify.com/s/files/1/0428/6588/5351/files/27582237903.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/44333002291.pdf
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/rules_of_subject_and_verb_agreement.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_off00005e55.bin
ca9b1b483b588625c7419cc72d5ece5fd84e40d572c2ca20c77c5b08be9e1d9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E55 5392 bytes
font_01_sfnt_off0000709b.bin
15af2fe9da3037520901f5d92ea35d41e9576e5eb08d76e27bf2c58e9fd5e55e
pdf-font-stream PDF embedded font (sfnt) at offset 0x709B 9980 bytes