Malicious PDF — malware analysis report

Static analysis result for SHA-256 7417395b298a5ec2…

MALICIOUS

PDF

44.1 KB Created: 2020-08-10 18:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f03f08affff1e79b16785980601caaf SHA-1: b43496561dec6b720353df5b16a27e0c62d77a6b SHA-256: 7417395b298a5ec24d6f2c0598ca7362af192bd1cb6ae95dae86be033307da05
154 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO manipulation tactic to disguise the malicious intent. No scripts were extracted, but the primary attack vector appears to be directing users to a malicious URL.

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=happy+birthday+piano+score+pdf
    • http://files.fleetvilleswingband.co.uk/uploads/1/3/1/4/131437225/resakunok.pdf
    • http://files.knightshalloffame.com/uploads/1/3/1/4/131483083/jokaranatig.pdf
    • http://files.palmdigital.org/uploads/1/3/2/6/132683111/zuduwej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/1415/0565/files/lightroom_5_keyboard_shortcuts_mac.pdf
    • https://cdn.shopify.com/s/files/1/0443/8881/0918/files/92218389643.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/4006/files/it_is_well_with_my_soul_audrey_assad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/tiruxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/gekuvotolujasikopokum.pdf
    • https://cdn.shopify.com/s/files/1/0436/7423/9129/files/xujifezapulesudarisis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/waladako.pdf
    • https://cdn.shopify.com/s/files/1/0434/6013/3031/files/s_chand_english_grammar_book_for_class_8.pdf
    • https://cdn.shopify.com/s/files/1/0430/9712/9109/files/59154798067.pdf
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/walulixifavigowod.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_off00006130.bin
95d76f05278603871194f2720164d1a267504178d2a02125ce0d03c020f1432e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6130 5204 bytes
font_01_sfnt_off000072cb.bin
c76a76fe40d896a531107d9063f8896f4a9764cf2aaa58de4574c672ceeaf4c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CB 10228 bytes
font_02_sfnt_off000095a5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95A5 4324 bytes

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