Malicious PDF — malware analysis report

Static analysis result for SHA-256 44694ebf4c4be69e…

MALICIOUS

PDF

34.3 KB Created: 2020-08-02 22:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc8177e9839dae2520efdda6ce614fd7 SHA-1: 8ba594a7ef5f769310dc5db6ef373c2e846fe0c6 SHA-256: 44694ebf4c4be69eb35fd27533f455380ffc7bb7efa30eb753ab239eb611335e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential SEO spam or link farm tactic to distribute malicious content. No scripts were extracted from this sample.

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=troy+bilt+pressure+washer+2800+psi+manual
    • http://files.carolynleighthomas.com/uploads/1/3/1/1/131163932/6ea5796c60.pdf
    • http://files.edusteminitiative.org/uploads/1/3/1/4/131483336/2590755.pdf
    • http://files.grandstrandsaltwateranglers.com/uploads/1/3/0/8/130813913/zilidurebanipikemoj.pdf
    • http://files.odonataseaglass.com/uploads/1/3/1/1/131163564/a10c3b1c5c816c4.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1509/files/23325872992.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/vapikomofolipubakude.pdf
    • https://cdn.shopify.com/s/files/1/0432/4448/6811/files/gavisusipolekokubisujokol.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/23513238778.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/xobofinij.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/fetamodejazolatoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/92059520220.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/bujos.pdf
    • https://cdn.shopify.com/s/files/1/0437/5432/4117/files/nadefodakakemolagulavi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/62527242282.pdf
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/safapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/lidowapuputabebot.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3782/files/29032082528.pdf
    • https://cdn.shopify.com/s/files/1/0434/9103/3250/files/90994019231.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/1/0434/6878/3782/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004757.bin
18df5b0c7c7068305c39ec27da429054e7cf3c1012d3a1acdf387e9571abdb04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4757 5808 bytes
font_01_sfnt_off00005b01.bin
8a9308578933883e3652b64c8d8122849abdb00d26d3977e8a30b07e46511b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B01 9696 bytes

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