Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceff41f0f2b8176e…

MALICIOUS

PDF

40.7 KB Created: 2020-08-23 10:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6446afc626758ed567642489a0dbe830 SHA-1: 8a695f1b0e64e7b5619f1c28063a524f4a728b90 SHA-256: ceff41f0f2b8176e30f34c93d15e5f1b8be444c97fe4c2a282eff8619fadec65
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc' with a lure related to an 'AMI BIOS update'. This link is embedded within a larger collection of PDF links, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains the same malicious URL and several other PDF links, some of which are confirmed benign, but the primary redirector is the critical finding. The primary intent appears to be directing users to malicious infrastructure via a deceptive lure.

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.cc/pify?keyword=ami+bios+update+free
    • http://files.gpuuc.org/uploads/1/3/0/7/130776196/xulexokawo.pdf
    • http://tufafige.diybuilds.ca/uploads/1/3/1/1/131164462/nafefo-xuwikajarekune-kafanepilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/60780249240.pdf
    • https://cdn.shopify.com/s/files/1/0445/8987/5364/files/pdf_to_word_converter_free_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/mapa_carcassonne.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/24679079699.pdf
    • https://cdn.shopify.com/s/files/1/0445/7309/8143/files/how_to_make_ender_portal.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/27293907037.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/zesap.pdf
    • https://cdn.shopify.com/s/files/1/0440/5441/3462/files/wovisuzozi.pdf
    • https://cdn.shopify.com/s/files/1/0461/8292/4441/files/gepulobim.pdf
    • https://cdn.shopify.com/s/files/1/0451/8114/1143/files/ben_10_movie.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_off0000628a.bin
50be02fa8d8cd9d288c7f25660d6d7d233f6375bf20a6bbb3fe0a9aa9fe9e0fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628A 5284 bytes
font_01_sfnt_off0000745e.bin
e04adaf2862d5ff5a9517213c6c63e94941b0e56959dc7d3053ca036dfa194bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x745E 10112 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.