Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a37283fcd8285a…

MALICIOUS

PDF

42.2 KB Created: 2020-08-06 04:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1367eeb72d6cabf411c0ccd012fa995 SHA-1: 09a0b573f02ad849db8a021e4e364d7ecda6f329 SHA-256: 85a37283fcd8285a35ec338b06507f8c8db2088605a07896d64733282d9ade91
170 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 traff.cc. It also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and references to PDF templates. The presence of a 'Password-protected archive handoff' heuristic suggests the document may be a lure for further malicious activity, possibly involving encrypted payloads.

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.cc/pify?keyword=day+of+the+dead+mask+template+pdf
    • http://files.hellorhighwaterfarm.com/uploads/1/3/2/6/132683168/gotatenix.pdf
    • http://files.optimistclubofcarlsbad.org/uploads/1/3/1/4/131453018/fe4bf68.pdf
    • http://files.waypointwes.org/uploads/1/3/2/8/132815298/jusumaxilibado.pdf
    • http://files.wineverytime19.com/uploads/1/3/1/6/131636676/xixigufanivijuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/28163949750.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/gta_5_xbox_one_dns_codes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/ladugipa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/zaleganuxivonu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/karti_igra_v_dyraka_podkidnoi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4647/6708/files/flashbang_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0440/9327/6312/files/luwiwivedodinojemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/gua_ilustrada_de_la_avifauna_colombiana.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/breathing_techniques_for_singing.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/88738004746.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/megobozarifovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1827/files/94618072007.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_off0000672c.bin
0488ea17207991f4d773a7a6523758f53537fe30200e63349ae611eadd43adda
pdf-font-stream PDF embedded font (sfnt) at offset 0x672C 5352 bytes
font_01_sfnt_off00007953.bin
f8cff7ad7b6206204f8b914f3bf396c43ee87b475e1b58c7567165a7550204b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7953 10096 bytes