Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d51039106e022a…

MALICIOUS

PDF

40.6 KB Created: 2020-08-31 04:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d92711e83a0e5c917c55961a4f27171 SHA-1: 6733b935aa0f57b3d412029df23d8f56c3f1ee9b SHA-256: f4d51039106e022af73218bae0ab2ca423ec38db1fa8c19d93e08fdbc411b958
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free download for a travel guide. The link leads to 'ttraff.com', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to a travel guide and the malicious URL, reinforcing the lure. The presence of numerous other PDF links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious content.

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/wix?keyword=dk+eyewitness+travel+guide+great+britain+free+download
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/xabajironobavodej.pdf
    • https://cdn.shopify.com/s/files/1/0462/5756/9946/files/27664914172.pdf
    • https://cdn.shopify.com/s/files/1/0439/8638/7102/files/australian_drinking_water_guidelines_ph.pdf
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/68030289709.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d3eb8c9cf294477bd1a2e232c109eff.pdf
    • https://static.usrfiles.com/ugd/451461_7604acb8a7b04207b004d1b800467611.pdf
    • https://static.usrfiles.com/ugd/7f929b_7ddb968e9c8647e4bb1859719cd31110.pdf
    • https://static.usrfiles.com/ugd/22739b_dca4637037f64384b7ee152da722ff3c.pdf
    • https://static.usrfiles.com/ugd/93971e_14325eafc81a482f88fb287c9a306871.pdf
    • https://static.usrfiles.com/ugd/a2e20a_9b4eb47692f24c759eabe277d4aaa949.pdf
    • https://static.usrfiles.com/ugd/d54300_2eacb1a86c824448bcac2f52104e2c69.pdf
    • https://static.usrfiles.com/ugd/a467d2_99532ce832dd4204a69e37383b782e38.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/ganolimituperiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9245/files/fighter_factory_mugen.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/57292730988.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_off00005ed5.bin
9c81c4765eafa260efe3d5d3cc39eb5269fee08ec15b2ef78eb94d90b6e576e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED5 5532 bytes
font_01_sfnt_off000071dc.bin
b7762fa99889c9c08c9827b6efefec48aa6c43b8c0a90c7186981d7b1320e0cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DC 10364 bytes

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