Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24aa58d72265cd0…

MALICIOUS

PDF

54.2 KB Created: 2020-08-03 03:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e681f7ace8ce92150e777c999339b1f SHA-1: 689a053e853f3005fb5567a4329da4fcaf74d439 SHA-256: b24aa58d72265cd0cb211bf3c176832481b219c1785a0d81a6b3e25977b21778
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a plausible lure related to 'Facebook networking interview questions'. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation or to host further payloads. The primary attack vector appears to be social engineering via a deceptive link.

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=facebook+networking+interview+questions
    • http://dered.carolinefsparks.com/uploads/1/3/0/9/130969061/13b4de.pdf
    • http://files.joshmaclennan.com/uploads/1/3/1/4/131408798/ramugilato_xobasaxisoto_vamanobufix_diruje.pdf
    • http://jajero.germantownchorus.com/uploads/1/3/1/4/131453990/linuvudo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3062/files/bevirilavuxufavufobapum.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/tn_drivers_license_renewal_locations.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/blade_runner_final_cut_1080p.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/rewebemekinanureti.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/41868757784.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/lojekutabapekami.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/55075098874.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/64245793794.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93515438816.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/gawenipisudenire.pdf
    • https://cdn.shopify.com/s/files/1/0437/9276/0994/files/42234239406.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/bijirezufared.pdf
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/67671817472.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a43.bin
a26fa58d227a91f26c622a5fd1a89779bbb0d80e3d7778c9740c0266dc3ff310
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A43 13008 bytes
font_01_sfnt_off00009430.bin
7f3227f6e1473680653a95b4047859f581f9ae8611d8f4b33522c57f89b93364
pdf-font-stream PDF embedded font (sfnt) at offset 0x9430 5372 bytes
font_02_sfnt_off0000a6a2.bin
d007fa24deb32870e914f4988a9a9971197e782b1e0d6bca7f0f7e2c6058a60f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A2 10652 bytes