Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd14575ec04a1fb…

MALICIOUS

PDF

42.7 KB Created: 2020-08-02 17:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3f837e4f9ac5ef0ba3790dc51894d8a SHA-1: a0d28ac40e29d5bf92ba7f1935b9794e5246a07d SHA-256: 1fd14575ec04a1fb66e18493e4ec105ba58ceaeb226cdf6c7ee2567d061d61b4
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One critical heuristic indicates these links point to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=north+las+vegas+animal+control`. Another heuristic identifies it as a PDF link farm, with many links pointing to Shopify domains, suggesting an attempt to obscure the final malicious destination. The document body contains garbled text but also includes the suspicious URL and a Shopify URL, reinforcing the link farm and redirection attack pattern.

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=north+las+vegas+animal+control
    • http://files.otoolelawgroup.com/uploads/1/3/1/3/131398542/cd080285d6cf61.pdf
    • http://files.nowakemusic.com/uploads/1/3/0/7/130739826/fawafo.pdf
    • http://files.deborahjonesyoga.com/uploads/1/3/1/4/131453127/xifopejotitaj-tetoduv.pdf
    • http://files.ogdenpediatrics.org/uploads/1/3/1/4/131453432/paxelenabobapasiboni.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/21346258609.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39086675177.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/gafafidimibaje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80884551140.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/17909621290.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6637/files/sawed.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/13234233470.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/92992556782.pdf
    • https://cdn.shopify.com/s/files/1/0439/3621/9291/files/wawonarabuwasidarudigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/35219906160.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/lelorawumajenuna.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/toefl_reading_passages.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_off0000682c.bin
06f28f25b738af1af81d43d1ede63358106db4712a7beeb08e2c124a2163240f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682C 5240 bytes
font_01_sfnt_off000079e4.bin
91cf48cb9c7962707686585dfffd8b9ce17f59254d5bb1daacfb02e0dd378fdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E4 10616 bytes

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