Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f8941b19bf9d0d…

MALICIOUS

PDF

33.9 KB Created: 2020-08-31 01:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03f7ae640d100da4f7ba09721c9fb167 SHA-1: df44b23ae5fe15fecc3e70bd19e390df6e2b8f60 SHA-256: 31f8941b19bf9d0d4c1be9c2f8989a3572742e14e9eec3c78e395bf11c4f7b6a
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or distribute content. Crucially, one of the embedded links directs to 'ttraff.ru', which is identified as a malicious redirector. This indicates a likely attempt to lure users to malicious infrastructure, potentially for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=cambridge+checkpoint+mathematics+cou
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/xofofoboxeso.pdf
    • https://cdn.shopify.com/s/files/1/0434/1855/0430/files/applied_cryptography.pdf
    • https://cdn.shopify.com/s/files/1/0462/2696/4631/files/24760778060.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/lonazipejaxufaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/aprendiz_de_brujo_libro_pnl.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/10818419324.pdf
    • https://static.usrfiles.com/ugd/b444d4_3c4cd7b096be4f8792f453a99b8116a0.pdf
    • https://static.usrfiles.com/ugd/10b11f_e8938ee5dc97418f86f9b99cda327669.pdf
    • https://static.usrfiles.com/ugd/432b07_1fa5fe28ddbe430ba460db43c767ef47.pdf
    • https://static.usrfiles.com/ugd/fac845_1f5d8b40cc0c44a18fa56e2ddcf28648.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/cancer_treatment_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0460/3625/4879/files/happy_birthday_wishes_for_mom_video.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/latukira.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53975554289.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3540/files/bistro_fada_chords.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_off000045e4.bin
82c5be70ff4b95e494ab23d67e0fd1352e2272a22895e42aed211cec2d97a0ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45E4 5564 bytes
font_01_sfnt_off000058a8.bin
0b501e8499a9062b56858a80c7b19cb548925dbcd1a726b72d8f009f01c781ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A8 10212 bytes

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