Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f5c6278090d638…

MALICIOUS

PDF

42.9 KB Created: 2020-08-02 17:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c556bc191a27102b846633bbf741baab SHA-1: 2fa30cc95491b1e62fd03da65c25e7f62c1b6221 SHA-256: d1f5c6278090d6385b60d18a903f5b80e318c8320c4acf3dc32eeb61836fadd4
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.ru' which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and text related to obtaining free software, suggesting a phishing or malware distribution lure. The presence of a large number of embedded links, many pointing to Shopify, further indicates an attempt to obscure the malicious destination.

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=make+photoshop+free+trial+forever
    • http://files.vegetablekids.net/uploads/1/3/2/6/132681836/kuwon.pdf
    • http://files.michaeljonesmusic.com/uploads/1/3/1/3/131397946/ab165baa7.pdf
    • http://files.confrontingaging.com/uploads/1/3/0/8/130814902/8642990.pdf
    • http://files.portsmouthcriminaldefense.com/uploads/1/3/1/1/131164113/xibasaleme.pdf
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/65345799600.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/55725632157.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/tevijovadigugazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/bopikozojituxugedunevu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/purenajapevo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/61300609630.pdf
    • https://cdn.shopify.com/s/files/1/0433/7057/8070/files/sharepoint_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/devi_kavacham.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/53917136362.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/84365643317.pdf
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/55393839838.pdf
    • https://cdn.shopify.com/s/files/1/0434/1157/0838/files/26247261742.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/
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/bopikozojituxugedunevu

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069dc.bin
7892d76756761c21f7bd65bdb615650b5021f89548812a2237f07fad444792ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DC 5116 bytes
font_01_sfnt_off00007b53.bin
b05e5b99d311c0c8144dfeacea40a8c1e2959816cddd17f0efda7bc2e7912274		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B53 10176 bytes

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