Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2676410c5aebdf…

MALICIOUS

PDF

32.7 KB Created: 2020-09-02 07:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7b180a3279ac8b0800354ce537d665c SHA-1: 4b32d01dbd635c02977cc2be99cb09e9085e742c SHA-256: 2b2676410c5aebdf58d71e6fff289585f3ecf7c86efacca361baedb560ec451d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click on the malicious URL, which is likely part of a phishing or malware distribution scheme.

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/wix?keyword=bravissimo+twin+transformado+2019
    • https://cdn.shopify.com/s/files/1/0465/4995/8814/files/10456493448.pdf
    • https://cdn.shopify.com/s/files/1/0430/6652/3809/files/82931287022.pdf
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/60597662643.pdf
    • https://cdn.shopify.com/s/files/1/0437/8417/5773/files/sipajupipogotuginona.pdf
    • https://static.usrfiles.com/ugd/58a813_bae4e8ea53a3487bb7405a61b7cb693d.pdf
    • https://static.usrfiles.com/ugd/33c377_a4a21ae461b640cd92c04be91919ce4f.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/titademafuzatadegejilewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/accounting_books_for_mba.pdf
    • https://cdn.shopify.com/s/files/1/0447/9143/1325/files/bach_flower_therapy_mechthild_scheffer.pdf
    • https://cdn.shopify.com/s/files/1/0433/8017/9100/files/42975287712.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004039.bin
adac6325ae39f2622fccc6e9f73cab04e70253872d4a799d7343f01cb8f01666		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4039 5704 bytes
font_01_sfnt_off000053a9.bin
fa1cd79c792f734145156e7cf9d861ebe0f4dd10d96fcd198c9ccd3c8fead147		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53A9 10348 bytes

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