Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f7e11b566ebac3…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 04:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70eafc0f6a2c8c1f929b3c4c26f29e8b SHA-1: 3ae3892810ad0a9a6b4e9423699c601e7d7ccb36 SHA-256: 76f7e11b566ebac363ebea32ee55588f84edd39242b3352c33b55cb193ae4aec
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 'https://ttraff.me/wix?keyword=mommie+dearest+pdf'. It also exhibits a PDF link farm heuristic, indicating it contains numerous external links, many of which point to benign Shopify-hosted PDFs. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs suggests an attempt to direct users to malicious sites, potentially for phishing or malware distribution.

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.me/wix?keyword=mommie+dearest+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalajenoderemomepofelefa.pdf
    • https://cdn.shopify.com/s/files/1/0461/7260/2531/files/34822885970.pdf
    • https://cdn.shopify.com/s/files/1/0467/5446/3907/files/netadena.pdf
    • https://static.usrfiles.com/ugd/b8c837_163e8874deb34935ad4f2c67a3d5db7d.pdf
    • https://static.usrfiles.com/ugd/599026_0c7618762e0f42c48b0510dd01bc1751.pdf
    • https://static.usrfiles.com/ugd/50c35f_0caad3ecaad340658b63bc7fb6c5fe92.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d9df525fec94099a8c97dcaba23c6f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_15186ec41161480583a176251b50e5bb.pdf
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/sat_preparation_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/pharmacy_biochemistry_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7317/files/tibired.pdf
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/acidification_of_urine.pdf
    • https://static.usrfiles.com/ugd/7f46b5_1128e1da047246cf8db7158fa1a59f07.pdf
    • https://static.usrfiles.com/ugd/30e015_88850c91d57345358a422a7092884451.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_off00006915.bin
42b89a2cb6d468d326825507818fdced19f6d2defc021f1ba38bce2cd577e8ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6915 5160 bytes
font_01_sfnt_off00007a8f.bin
4e35b33a948af977d2ea6c1d1392bf59866acb900487b2f3f91f9e7be95e6da6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8F 10456 bytes