Malicious PDF — malware analysis report

Static analysis result for SHA-256 946c8035e75e1ccc…

MALICIOUS

PDF

49.0 KB Created: 2020-09-05 17:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d223357dea8d47c183fe3c513c41e7b2 SHA-1: 918af5b6de0e325b2a30b776678239ff558913a9 SHA-256: 946c8035e75e1ccc37199f22a4b2bca87cf03a46dc759da9cf878b2372e346e0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.link, which is likely used to funnel victims to malicious sites. The document also features a large number of embedded links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier strongly indicated maliciousness, supporting the observed redirection and link farm behaviors.

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.link/wix?keyword=albert+einstein+brain+information
    • https://cdn.shopify.com/s/files/1/0432/3855/5805/files/beetalk_free_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/xejoliseraginumizosavebij.pdf
    • https://cdn.shopify.com/s/files/1/0433/3977/6159/files/basic_brain_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/38832629437.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/lavupevavut.pdf
    • https://cdn.shopify.com/s/files/1/0436/1512/5662/files/23304190205.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2323/files/video_aula_de_frances_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0435/0931/7787/files/jumozapuxivejezog.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/tovabomef.pdf
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/personality_color_test_red_blue_green_yellow.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e124e27a9ad40eaa2c231729b4f7778.pdf
    • https://static.usrfiles.com/ugd/b8c837_71579a2e973a4942a47c4e245a47f217.pdf
    • https://static.usrfiles.com/ugd/d162e3_590d5f2549e4460985b495ff2d078e98.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075fa.bin
d674c23d613caa5f42f5b55934a97a4fb63381e8a4b7db00f578547d73c6663f
pdf-font-stream PDF embedded font (sfnt) at offset 0x75FA 4828 bytes
font_01_sfnt_off00008638.bin
2585e3855b1f1c95e944ad6090d5d2612b9fea2df8abbf9431812e283fbce7d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8638 10088 bytes
font_02_sfnt_off0000a8b3.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B3 4324 bytes