Malicious PDF — malware analysis report

Static analysis result for SHA-256 6538d85af0f6af9d…

MALICIOUS

PDF

43.0 KB Created: 2020-08-29 23:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00501e0989c7bfc25859fef2b301e3da SHA-1: 4945e7a12effb0a300dc946c9a3963cecb5102ca SHA-256: 6538d85af0f6af9dac7f533b5bc898f00b453ac5838cc528da48e619d0f8b315
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link pointing to 'ttraff.ru', which is flagged as malicious infrastructure. The document body, though heavily obfuscated, contains the same URL and a shocking phrase, suggesting a lure to generate traffic to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates the PDF contains numerous external links, further supporting the traffic generation or SEO manipulation motive.

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.ru/wix?keyword=yellow+puss+coming+out+of+pennis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/8e1900_a08a94e012934ba380c84d330b5b503a.pdf
    • https://static.usrfiles.com/ugd/253000_8256aab75ada4a5286f82400d3b36983.pdf
    • https://static.usrfiles.com/ugd/e2c250_1750f7debb114bd69d87a1c9f881bde5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c10aad2fbc846258c93f6f9b85cf4f6.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3232/files/presentation_on_pakistani_culture.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/usa_time_zone_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/55094289515.pdf
    • https://cdn.shopify.com/s/files/1/0454/6691/0872/files/clinical_pharmacology_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/tejal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/81079989723.pdf
    • https://static.usrfiles.com/ugd/b8c837_570843dfa00848aa8f001642ff081495.pdf
    • https://static.usrfiles.com/ugd/a467d2_09cb1deb39f64667952eb955882fd9b0.pdf
    • https://static.usrfiles.com/ugd/0789d5_eb6ce5e56e504d5db1895f1d372028dd.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_071b9a69dff64b78a690b2cfefba160c.pdf
    • https://static.usrfiles.com/ugd/12dc78_a7e449fbd7294693bfd94bbb782fc0e0.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_off00006aec.bin
00030d46cbb636fc47d94fe0370b91f0dd474e5530fd61a90f55285d9509bdfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEC 5084 bytes
font_01_sfnt_off00007c48.bin
72d64c949b0f240d5119462e9da9790cad73ca8468ccd96514afece2a0876492		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C48 10148 bytes

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