Malicious PDF — malware analysis report

Static analysis result for SHA-256 1085c5a2cc2519b5…

MALICIOUS

PDF

44.0 KB Created: 2020-09-01 23:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6e3244c248751de3881c7ee54d7ab1e SHA-1: e5413e776b1b3703acfd6f4f3ebbae08136381e3 SHA-256: 1085c5a2cc2519b59307fc455bb89ede6fa5b27bf18227600441ffbe822e07a1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=adobe+photoshop+lightroom+cc+premium'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure for users seeking software. The presence of many PDF links, some pointing to benign Shopify URLs, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the primary malicious destination.

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=adobe+photoshop+lightroom+cc+premium
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8205/5829/files/phases_of_ontogenetic_development.pdf
    • https://cdn.shopify.com/s/files/1/0462/4941/0714/files/jatorowadasokumutakuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2608/7064/files/kaveviratudexuga.pdf
    • https://static.usrfiles.com/ugd/0aab01_a4b04295a0c34c71a08a6deffe3dbcd5.pdf
    • https://static.usrfiles.com/ugd/003b86_aab6326d18ae45e7aa8b12749918b547.pdf
    • https://static.usrfiles.com/ugd/7f46b5_fe2c299276004863b64e120acc4acbcd.pdf
    • https://static.usrfiles.com/ugd/94e5ef_ffa0d117eb1544ffb2b73e64de31dafd.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/pogevisepunakekakuvena.pdf
    • https://cdn.shopify.com/s/files/1/0439/5725/6350/files/47857062568.pdf
    • https://cdn.shopify.com/s/files/1/0434/5325/1751/files/hp_officejet_5745_e-all-in-one_printer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/zebosuzevasizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/ritutuvuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25006313747.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/alyson_stoner_missy_elliott_performance_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3535/files/64821835923.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_off00006d18.bin
7fa1d5ce03fe9bb65a8ed091abee29ce05e486520b4a0bdbdc415be53a2014d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D18 5408 bytes
font_01_sfnt_off00007f51.bin
3c610f0349a33b661d92fcee2d86ed595d2aeff4dd38dbbccfb94c81dd018903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F51 10552 bytes

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