Malicious PDF — malware analysis report

Static analysis result for SHA-256 065bfe7e92a79458…

MALICIOUS

PDF

44.6 KB Created: 2020-08-04 20:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90c7dba9cc56ffe113247dc8d75f3197 SHA-1: f75b305243c5970ab747db04c0f7476efba97501 SHA-256: 065bfe7e92a7945835d87fac13b3622da938480237920401ed033db43ef84783
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure at ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, reinforcing the malicious intent.

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=analytical+ability+questions+answers+pdf
    • http://files.thesignificantmarriage.com/uploads/1/3/0/7/130740257/2740878.pdf
    • http://files.dori-shasha.com/uploads/1/3/2/7/132740384/vezudo-gudepi.pdf
    • http://files.sofsdesigns.com/uploads/1/3/1/3/131383958/6564889.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/7198/0198/files/cism_review_manual_2015_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/74347113915.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/emotional_intelligence_2._0_full_book_pdf_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6515/4463/files/arithmetic_sequence_practice_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9449/9743/files/42854774473.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3271/files/78662214012.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0738/files/4161065511.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xibazukikamemawamiwemin.pdf
    • https://cdn.shopify.com/s/files/1/0429/6038/8262/files/271496496.pdf
    • https://cdn.shopify.com/s/files/1/0438/5207/1074/files/edit_documents_on_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9179/5873/files/lekinuzixetigobafezoku.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/bobcat_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/clep_calculus_practice_test.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a2.bin
9ba8c1bae76d08792e7223f3f4aede92d05f8b69c17c8955f9f895cb3dfa4918		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A2 5480 bytes
font_01_sfnt_off00007553.bin
78198cfab759941ad06d1f9bb3adfbf2fa7546110d0f5f23d77c3bf7417b8044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7553 9932 bytes
font_02_sfnt_off00009716.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9716 4324 bytes

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