Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11796eb65ee2a0a…

MALICIOUS

PDF

103.2 KB Created: 2020-07-30 17:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 780a923de9556f2a8cf3fc91c37b2d8a SHA-1: 8846a67151fb0b5d2b0259c7dc7db32dc149a627 SHA-256: d11796eb65ee2a0ab7829a56c01dbf9de47cbc6de847a961a906f11b31bc14dd
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.com/pify?keyword=behaviourism+cognitivism+constructivism+pdf', is flagged as a malicious redirector. The document body is heavily obfuscated, but the presence of numerous external links suggests a traffic-driving or SEO-spamming campaign.

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.com/pify?keyword=behaviourism+cognitivism+constructivism+pdf
    • http://files.pjfxstudio.com/uploads/1/3/1/4/131407691/6471219.pdf
    • http://files.gethealthmassage.com/uploads/1/3/1/8/131871786/1ed402c01.pdf
    • http://files.bhi5.com/uploads/1/3/1/4/131408415/xotesurimix.pdf
    • http://files.activetrainingandtherapy.com/uploads/1/3/1/4/131437131/31529ac93e6.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/99548897888.pdf
    • https://cdn.shopify.com/s/files/1/0431/3120/7837/files/pemabepomabenuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/vebuzejelabivixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5235/files/sododivetagakina.pdf
    • https://cdn.shopify.com/s/files/1/0430/9532/6887/files/61598425654.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/70478121402.pdf
    • https://cdn.shopify.com/s/files/1/0433/1814/9285/files/41051897349.pdf
    • https://cdn.shopify.com/s/files/1/0437/8941/8657/files/rojijefazavuxawusukilez.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xakikalimakimoxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/xegagesipidiget.pdf
    • https://cdn.shopify.com/s/files/1/0431/6944/8097/files/6680074062.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/kimofipabududasotuvami.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_off00015822.bin
81c0cc64f773d5ba38f9450be2bffd8e2737cc0ae4fe4e9fa2ca62c761bda24a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15822 5528 bytes
font_01_sfnt_off00016ad5.bin
db53283b1c6e5c9cbf929e1457963ae0bf8f4f79bd9a024e461b45f30f0937fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16AD5 10552 bytes

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