Malicious PDF — malware analysis report

Static analysis result for SHA-256 12896198183e18be…

MALICIOUS

PDF

68.9 KB Created: 2020-08-18 15:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06fa39cd96c42c945f9215121dec116e SHA-1: 86fadbe3b22e2612e96d368bdf3be8a0cceab0d0 SHA-256: 12896198183e18bed7dfac633fa7e9541663a4b6084caba527a8baf3f6ac2b16
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains a URL that matches this redirector. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to obscure the malicious destination. 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.ru/pify?keyword=form+wizard+bootstrap+4+with+validation
    • http://files.blindpartsonlineaustralia.com.au/uploads/1/3/0/8/130874017/49852f1445fb45c.pdf
    • http://files.heartofillinoisorff.org/uploads/1/3/1/3/131379371/9586210.pdf
    • http://files.dignityandgrace.com/uploads/1/3/2/6/132682745/vavovozufu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/40602202281.pdf
    • https://cdn.shopify.com/s/files/1/0446/2955/7411/files/83155566580.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/best_books_on_leadership_and_management.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/interplay_adler.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/tanarisapepofirevidasom.pdf
    • https://cdn.shopify.com/s/files/1/0436/5756/0217/files/17105244535.pdf
    • https://cdn.shopify.com/s/files/1/0428/8253/1481/files/animations_in_powerpoint_free.pdf
    • https://cdn.shopify.com/s/files/1/0441/0189/4296/files/mehndi_designs_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0433/4714/8950/files/how_to_bypass_administrator_block.pdf
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/betaina_hcl.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3554/files/wurodag.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4150/files/advanced_english_placement_test_with_answers.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_off0000c008.bin
20fee3df2ea5df6d98fb6b10a27d770e9425bb3edc8acc9ce2511bb229243b68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC008 5584 bytes
font_01_sfnt_off0000d301.bin
31c4d72fdef3c684186d7af57125196032d9482e5a606df39e8c474f6d9c0cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD301 15444 bytes

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