Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b757b6bed3654c…

MALICIOUS

PDF

120.8 KB Created: 2020-08-11 08:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a51ca2b3a386e7702b5518904592c209 SHA-1: ea2fe1b125164808f181e6e46f76796c4a045035 SHA-256: 12b757b6bed3654c66ed7dcfbde2b5963e4b73e43691c51940104ab571a3aeba
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, indicating a link farm or redirection attack. The primary malicious link identified is https://ttraff.ru/pify?keyword=aiag+advanced+product+quality+planning+apqp+2nd+edition.+pdf, which is flagged as a malicious redirector. The document body also contains this URL, suggesting it's the intended lure. The presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

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=aiag+advanced+product+quality+planning+apqp+2nd+edition.+pdf
    • http://files.kfundtutoring.com/uploads/1/3/1/4/131438337/bodawabemija.pdf
    • http://files.stevewhyteguitar.co.uk/uploads/1/3/1/8/131856602/vuvasigodob.pdf
    • http://files.flashfoto.com.au/uploads/1/3/0/8/130813846/nivuladimotede.pdf
    • http://files.eyelightdesign.com.au/uploads/1/3/1/4/131408970/95930.pdf
    • http://jepuzuker.lucycampbell.net/uploads/1/3/1/1/131164250/8bef00c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0449/0140/0731/files/25324087951.pdf
    • https://cdn.shopify.com/s/files/1/0433/1782/1605/files/kizog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suxuteregejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/kupejezuke.pdf
    • https://cdn.shopify.com/s/files/1/0444/0273/7318/files/german_a2_formal_letter_writing_samples.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6485/files/subtracting_integers_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/8807/7209/files/golewunoperaxalos.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/jelos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9272/files/61640545068.pdf
    • https://cdn.shopify.com/s/files/1/0431/2730/8454/files/wiwekofijajupesijaba.pdf
    • https://cdn.shopify.com/s/files/1/0434/2241/7046/files/93268403854.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_off00019784.bin
569a377e6e961b1c2a655ae6f63443b73f9ead2fcb6a4bd915aac75e2b66a61d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19784 5584 bytes
font_01_sfnt_off0001aa99.bin
08003817fcc24803b663fe7d11a54fb4d34497ba63f441ec90b4ed3f727dd25d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA99 13408 bytes

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