Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca6758df45fde41f…

MALICIOUS

PDF

46.1 KB Created: 2020-08-03 08:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8a9428d04274315d20bfe2218703c65 SHA-1: e478a2af386ff1b5efa21209d93910644d729e9a SHA-256: ca6758df45fde41f8a3ce21dbe0bb3606f6917ccdaf6f5d6274f82bb8b9c6ddd
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=fallout+76+water+filter'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=fallout+76+water+filter
    • http://files.williamtmohn.com/uploads/1/3/1/3/131380480/1989840.pdf
    • http://files.authorherbsennett.net/uploads/1/3/0/7/130775848/zajagomeveti-wekewibuvokuxaf-duwakaxadovov-kutako.pdf
    • http://files.jencullertonjohnson.com/uploads/1/3/0/7/130775640/b06813dd2.pdf
    • http://files.jazzrecordartcollective.com/uploads/1/3/1/3/131379678/8062581.pdf
    • http://files.youthdigital.com/uploads/1/3/0/7/130775373/554fb.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/butudodabidariruwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4327/4395/files/jupamudoligasate.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/fapoxivuke.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67264452348.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/65932445518.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/torodiwasurelan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gegexovikorojirokelaxedu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/43357570044.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/john_deere_brush_hog.pdf
    • https://cdn.shopify.com/s/files/1/0437/3640/0037/files/bonaboxet.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/vutixitulikoxok.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1968/files/zexinosamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/echo_cs_400_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006252.bin
645370794234eb1720b1a26fbac1ae6d5049b831c0b757a9979c6faaa9c6b796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6252 4864 bytes
font_01_sfnt_off0000730a.bin
b63004c05a14783664bd769ed554c06c3d493c9a4fdbada6ee19da5e891a2f16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730A 10384 bytes
font_02_sfnt_off000096a1.bin
bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96A1 16060 bytes

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