Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5950e531018da13…

MALICIOUS

PDF

50.5 KB Created: 2020-08-07 12:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ea28048ac120bf1956f3f5c0a935d57 SHA-1: 55dd05d437f6bd8d5dbe634d73b1626e3c48a06b SHA-256: e5950e531018da13388d68c74349405f9c83deb972aa2430b94cfe8c24fabb76
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including Shopify. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=water+bioremediation+pdf`. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious infrastructure. The document body is heavily obfuscated and contains the malicious URL, further supporting this attack pattern.

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/pify?keyword=water+bioremediation+pdf
    • http://mamamavil.ibizarentaudio.com/uploads/1/3/1/4/131482995/83080b14b6cccde.pdf
    • http://vexakonek.grantclifford.com/uploads/1/3/1/6/131607600/lerirumikoka.pdf
    • http://files.catherineodriscoll.com/uploads/1/3/1/4/131452887/6873501.pdf
    • http://files.fraudcamp.com/uploads/1/3/1/6/131637135/09d61d129ba731.pdf
    • http://vexakonek.grantclifford.com/uploads/1/3/1/6/131607600/leriru
    • https://cdn.shopify.com/s/files/1/0431/8072/0285/files/jafojelinuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/68954907131.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9066/files/bentley_price_list.pdf
    • https://cdn.shopify.com/s/files/1/0436/5893/6473/files/dark_souls_3_fire_witch.pdf
    • https://cdn.shopify.com/s/files/1/0437/8443/7922/files/wevatowuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/chemical_nitrogen_fixation.pdf
    • https://cdn.shopify.com/s/files/1/0428/4442/2310/files/5690473682.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/83712193697.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/digestive_enzymes_table.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/61909793681.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/boiling_point_elevation.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/.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_off00008765.bin
5219fd454015175d027037616940a79c97cdea15d87d74c88a09a2f137bf5de7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8765 5128 bytes
font_01_sfnt_off000098cb.bin
5a5582d15c4ee80562910551c6bb5ea57c48c6eea8f1f1663d35080364eebd49
pdf-font-stream PDF embedded font (sfnt) at offset 0x98CB 10572 bytes