Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e14701b13c6d5a…

MALICIOUS

PDF

47.1 KB Created: 2020-08-06 22:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d5d85e6c0607c3bfd58c31bd69ecd4f SHA-1: 42e8abaf894cd02cf9c588839815fbbd1f33dec1 SHA-256: 43e14701b13c6d5a407aec4663b9b38a26b54f6d56fe65b950fcdcbe4f3f8f7c
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it's a malicious redirector, pointing to 'https://ttraff.com/pify?keyword=job+acceptance+letter+pdf'. This URL is presented within the document body, disguised as a job acceptance letter, to entice users to click. The PDF also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The primary malicious URL is the most critical IOC.

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=job+acceptance+letter+pdf
    • http://bixenefel.growabroadllc.org/uploads/1/3/1/3/131379732/ruxowilob.pdf
    • http://jujes.gtts.eu/uploads/1/3/2/6/132695278/tovadixeniligos-lavawagag-dekalu-kutuxonubagam.pdf
    • http://rumiviv.understandingwhowewere.com/uploads/1/3/1/4/131453540/tilinafiwud-pivisaxemoji-jolujako.pdf
    • https://cdn.shopify.com/s/files/1/0435/4686/9911/files/roofing_contract_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1160/files/aterosclerosis_carotidea.pdf
    • https://cdn.shopify.com/s/files/1/0434/2700/4577/files/xapatexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/the_new_psycho_cybernetics.pdf
    • https://cdn.shopify.com/s/files/1/0434/8248/0806/files/26035147031.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/web_root_spysweeper.pdf
    • https://cdn.shopify.com/s/files/1/0436/0853/9299/files/61393131560.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/tonaxitew.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/11231581154.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_off00007d02.bin
667c404c933f34c5323b6f0507ab7d88c9f1cac62806711a1930198e1c377bd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D02 5100 bytes
font_01_sfnt_off00008e69.bin
28047aeef2b0d32f819abe9e202a89f05a461b2dcfda08f6ec8f4b3c870113cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E69 9940 bytes

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