Malicious PDF — malware analysis report

Static analysis result for SHA-256 a695ccc57352e64e…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 14:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 546570e34ffbe6fc325ebed48ec190eb SHA-1: 2d9165bf705a2a715020edd14dabdf0f4c36be56 SHA-256: a695ccc57352e64e1a0ca7681463c89373ee06db23f7466dd3621b008a0c87f1
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=alberic+de+bordeleaux+guide', is flagged as a known malicious redirector. The document body contains metadata suggesting it was generated by wkhtmltopdf, but the primary malicious activity appears to be the extensive linking strategy.

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=alberic+de+bordeleaux+guide
    • http://files.sardiniareview.com/uploads/1/3/2/7/132711999/mirajuvojuvon-xakomopukum-puvirupof.pdf
    • http://files.richardrbmarcus.com/uploads/1/3/0/7/130776027/terukemuj.pdf
    • http://files.redravenacupuncture.com/uploads/1/3/1/4/131437018/navigaxumuwowi.pdf
    • http://files.gettingtogethernow.com/uploads/1/3/2/6/132695294/notivabixe-mixetujim-gepijavam-zewerufenuro.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/daily_motion_song._com.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/25387984790.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/braiding_sweetgrass_kimmerer.pdf
    • https://cdn.shopify.com/s/files/1/0434/6436/0100/files/resulemiwogawejubome.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nifafujejugafux.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5565/files/neurological_impairments.pdf
    • https://cdn.shopify.com/s/files/1/0432/6794/8708/files/51740114225.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_off00006504.bin
b59cc623af1a3014eabae9fd470671f5d4d23c7e86c83b3fe5ed7c7931283760		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6504 5128 bytes
font_01_sfnt_off00007679.bin
de30eb35f7dde861981f274db827d80f4ca863afbc0aee79169f4f22d7090f41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7679 10616 bytes

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