Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e658193ca5e51d…

MALICIOUS

PDF

56.2 KB Created: 2020-08-22 05:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99f6e061897bfbef0bdc4ab303b1fdcd SHA-1: 57b37d9c07c99467fbe30dd260d30d48e19e58ff SHA-256: e3e658193ca5e51d19d6e7ea3f873718093da870f910866e34ef9e0af9a8aab6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=ugandan+music+songs'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The document body contains the malicious URL, suggesting an attempt to lure the user into clicking it.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=ugandan+music+songs
    • http://files.nusfolio.com/uploads/1/3/0/9/130969305/negezokinujup.pdf
    • http://files.andrewmichaelart.com/uploads/1/3/1/4/131408529/59fa416c9cccb3.pdf
    • http://lawixafo.ikhlastours.co.nz/uploads/1/3/2/3/132303093/9422080.pdf
    • http://files.brownperformancecoaching.com/uploads/1/3/2/6/132695566/7a27df0fce.pdf
    • http://menoni.movewithinyoga.com/uploads/1/3/0/7/130776257/1691011.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8986/files/bl_theraja_electrical_machines.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/fuxoretexalajemojusut.pdf
    • https://cdn.shopify.com/s/files/1/0429/2080/4511/files/common_synonyms_used_in_ielts.pdf
    • https://cdn.shopify.com/s/files/1/0447/0652/9434/files/rikasaxajesisebibabevaka.pdf
    • https://cdn.shopify.com/s/files/1/0432/0552/5661/files/godazubolekil.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/29235564102.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6384338271.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/77537950910.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/business_information_systems_jobs.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7501/files/tuwitotibase.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/36128380496.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/
    • https://cdn.shopify.com/s/files/1/0447/0652/9434/files/rikasaxajesi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a04a.bin
47d3a96fc5d9e2a2765b80a9dd66275411003e7715b00afc48ddda9480b28980
pdf-font-stream PDF embedded font (sfnt) at offset 0xA04A 5124 bytes
font_01_sfnt_off0000b19e.bin
563022aa232c7603c6e28ed0f81df9ab5f3881cb12dbec3a32b76b3c8906000c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB19E 10008 bytes