Malicious PDF — malware analysis report

Static analysis result for SHA-256 6962ca7c3226dfb4…

MALICIOUS

PDF

45.0 KB Created: 2020-08-11 04:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 714ed8529bd662440565e449edd7f02f SHA-1: 7ee2c30523c1b22ba77e5703884394c4589ad612 SHA-256: 6962ca7c3226dfb4f1514b47f214e8b20b616d5b9d920ab2e57d98cb195eb551
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 a link farm infrastructure designed to redirect users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to ttraff.cc, a known malicious redirector. The document body, though heavily obfuscated, contains text related to anatomy and the wkhtmltopdf tool, suggesting a deceptive lure.

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=sistema+reproductor+masculino+anatomia+pdf
    • http://files.artisticreteleesburg.com/uploads/1/3/0/9/130969709/malolef.pdf
    • http://files.oldetowneslidell.com/uploads/1/3/0/8/130874241/fewezetaparut.pdf
    • http://files.mansioninternational.com/uploads/1/3/0/7/130775396/4025645.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/1240697967.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/masalujozagi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/vocabulary_worksheets_for_grade_10.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/nimojugarufaloxuvotabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/gezunomowipemepotina.pdf
    • https://cdn.shopify.com/s/files/1/0438/9509/5464/files/classroom_games_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0436/4386/3198/files/how_to_find_slope_from_two_points.pdf
    • https://cdn.shopify.com/s/files/1/0431/6499/1637/files/you_the_owner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/kagalubamibidite.pdf
    • https://cdn.shopify.com/s/files/1/0440/2269/4038/files/dikuti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sabam.pdf
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/pemokizegis.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_off00007138.bin
110ce6ecd08b827f85aa0e2b741de7a77f66a04a54c455db27bfd82eed29bc67
pdf-font-stream PDF embedded font (sfnt) at offset 0x7138 5404 bytes
font_01_sfnt_off00008372.bin
3d7bc228473e0a127d88134cc4d8985f31f69640256e3e1eeb0f67ac172934cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8372 10996 bytes