Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2408f7cd81bef4e…

MALICIOUS

PDF

34.3 KB Created: 2020-08-01 17:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91e0504bf62d01e2658f885da1aa1ab7 SHA-1: 03d23ffb85f57334ac7c3c3e3645538a133e07cb SHA-256: b2408f7cd81bef4eb65158bd9be580a734689f8a969a900aeafe95c81ce46b8a
120 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 external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm or SEO poisoning tactic to increase visibility.

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=chemistry+atoms+focused+approach+pdf
    • http://files.ultimatesyntheticlubes.com/uploads/1/3/1/4/131437139/narit.pdf
    • http://files.stealthgraphix.com/uploads/1/3/1/3/131383837/vuwowu.pdf
    • http://files.bandoncoosbaybuilder.com/uploads/1/3/1/4/131452981/5261042.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/53431784291.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lujodegiduwidixerilaji.pdf
    • https://cdn.shopify.com/s/files/1/0434/7225/7181/files/zoxiputovirarezasife.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9762/files/dizakufuvoturowavub.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/35718777551.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/49117384003.pdf
    • https://cdn.shopify.com/s/files/1/0430/0157/7625/files/66892588001.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/10240011334.pdf
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/xilakodekimom.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/kakujitamijokapuxalo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7822/files/jojilafukufupugokuxasux.pdf
    • https://cdn.shopify.com/s/files/1/0435/1092/3423/files/lagufopodura.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_off00004922.bin
81d3a01c0444876eb8828576fca57b6ea3e6902c7b86e05d7e6e0c4ea8fea699		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4922 5368 bytes
font_01_sfnt_off00005b3d.bin
7e0d904f6c16d1164902c59198a7246e2ffd7f500eb9e104aaa05e7ed66f6a9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3D 9708 bytes

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