Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a9bb86cf394b9c…

MALICIOUS

PDF

40.8 KB Created: 2020-07-31 18:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a60a7455d0c4a34e074f4d75b261f71 SHA-1: 363deef4421cc3607e37f272bf47eb827baf0bb7 SHA-256: 25a9bb86cf394b9cd3a5f43da03cf98806dfda5aeb6fc25b55fcb21d384fcc82
120 Risk Score

Malware Insights

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

The PDF document contains a lure related to a common technical issue ('My mic isn't working on discord') and embeds numerous links. One of these links, 'https://ttraff.com/pify?keyword=my+mic+isn%2527+t+working+on+discord', is identified as a malicious redirector. The document also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to distribute the malicious redirector.

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=my+mic+isn%2527+t+working+on+discord
    • http://files.gpgcobra.net/uploads/1/3/1/4/131483209/buzebalor_zusome_salejiromejud_tamewu.pdf
    • http://files.carlgroup.org/uploads/1/3/1/3/131398222/3502960.pdf
    • http://files.chayetione.com/uploads/1/3/0/7/130740193/fopajinuramuruz.pdf
    • http://files.mastercreatorsadventureretreat.com/uploads/1/3/1/4/131437091/bizitesukoratinov.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/60267009888.pdf
    • https://cdn.shopify.com/s/files/1/0436/5054/7870/files/38706975641.pdf
    • https://cdn.shopify.com/s/files/1/0433/5242/4598/files/27986207635.pdf
    • https://cdn.shopify.com/s/files/1/0438/6321/2192/files/55813787052.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/xutoxixisu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5089/2440/files/gexopijexunumogi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/78726415334.pdf
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/73866204950.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tawoxusabevesumaxev.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/kegev.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4743/files/dugokisilizobigufewapit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3160/0031/files/82419428817.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/vexuwetusovutexidavu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9511/2347/files/37958078605.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_off0000624f.bin
2b94939aefad14beffbd03a1ba36303d64bf002fddc7703e3cd620f155f5aed5
pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 5316 bytes
font_01_sfnt_off0000747e.bin
be490f397737d46d1cb881e863cff5835a4823559a22750c41da0f5d72d96667
pdf-font-stream PDF embedded font (sfnt) at offset 0x747E 9848 bytes