Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0b1b14f45e29ae…

MALICIOUS

PDF

39.8 KB Created: 2020-08-19 14:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29f06a6f8b841e74c14a74e2d2ff4f3f SHA-1: d75b3282be9fe17228cbf309a30832f2ad05ca0b SHA-256: 0b0b1b14f45e29ae4570a4124deda4c4dbe186278e54d4623dd37ee812bf0f87
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to redirect the user to malicious content. 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.com/pify?keyword=argentina+football+league+table+and+form
    • http://luxipe.beautyandbreakdowns.com/uploads/1/3/1/6/131636655/nukari.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6733015585.pdf
    • https://cdn.shopify.com/s/files/1/0437/0975/9641/files/cancer_de_piel_tipo_melanoma.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/57249504419.pdf
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/87379362761.pdf
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/ripediwirep.pdf
    • https://cdn.shopify.com/s/files/1/0438/0078/9154/files/pelovivawewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pawatofamilafal.pdf
    • https://cdn.shopify.com/s/files/1/0428/6811/3574/files/refevawefokikiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1129/2827/files/lightroom_app_free_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/katavefegu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3218/9860/files/griffiths_solution_manual_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/73373623879.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/xobopejewaxig.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_off00005cbf.bin
0e9d462c1ca76f74fe3bed98459462e96e71dd8a59c0bd693877da4d522c9f22
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBF 5180 bytes
font_01_sfnt_off00006e3d.bin
01044fcb399e1c9775dfc62a838467b3fac85e73d06ba952b916b40e038a0bcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3D 10096 bytes