Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c91acf805e2ffb…

MALICIOUS

PDF

42.1 KB Created: 2020-08-21 05:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be356f717699d0010d85980d9ffce4e7 SHA-1: 2d41dc9dd2feacb3e809f7d13da46f0040642fa9 SHA-256: d1c91acf805e2ffbe1e1294592924732fcaff00cf699fc83dc7aa6de78197de3
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF filename, suggesting a lure to download further content. The presence of a 'download button' heuristic reinforces the social engineering aspect.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=convertible+note+example+template
    • http://files.marmeladapicks.com/uploads/1/3/2/6/132696210/956438.pdf
    • http://files.americasbluesmovie.com/uploads/1/3/1/3/131380641/zedozaduxixo-gimato-mikixejijudepi-nigedijevo.pdf
    • http://files.woodsidewildebeests.com/uploads/1/3/1/0/131070216/2409670.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/angle_construction_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0449/7804/5096/files/42429818606.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/lil_wayne_carter_4_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5957/5958/files/xukikedisapimob.pdf
    • https://cdn.shopify.com/s/files/1/0437/0789/1877/files/mojokugedasobun.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2068/files/bixaxuneregelukanasenexov.pdf
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/jevamefifitawubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/52192585670.pdf
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/kewagalekoroxusoratuniti.pdf
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/mebiwekujak.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/engineer_cosmetic_loadouts.pdf
    • https://cdn.shopify.com/s/files/1/0428/9963/6390/files/ramogojizajamonevipa.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_off000066a7.bin
315cbb064deead0b96843fbc49fde2e4e873303a70e182bd5c64e1f11b74f01e
pdf-font-stream PDF embedded font (sfnt) at offset 0x66A7 4960 bytes
font_01_sfnt_off0000776e.bin
3c2105dee0dc2952a90a11faac5f7ceefc184c20d2af074ef8b23e870c8e29e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 10580 bytes