Malicious PDF — malware analysis report

Static analysis result for SHA-256 278b14de815e54ff…

MALICIOUS

PDF

44.6 KB Created: 2020-08-20 02:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3c243686112ce4c1c13088ef089d87f SHA-1: 290fdcd627d883e74829bd65f4061a82f9e04ed7 SHA-256: 278b14de815e54ffbc315aba39e215c12912736530d8fe2f9b5f9b3f3e477b32
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link to 'ttraff.ru', suggesting a phishing or malware distribution attempt. Another heuristic identifies a PDF link farm, with numerous links hosted on 'cdn.shopify.com', further supporting the attack pattern of directing users to potentially harmful content. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=former+quarterbacks+for+pittsburgh+steelers
    • http://files.ljkplumbingandheating.co.uk/uploads/1/3/1/4/131406717/wuvalelezo_gobubuzodobeteb_sojozajasa_sejimumameg.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/66589843539.pdf
    • https://cdn.shopify.com/s/files/1/0435/3982/4799/files/momufowizoji.pdf
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/rijuwukasitivodirejop.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/tudarutoraked.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/axcrypt_1._7_3180.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/vokotama.pdf
    • https://cdn.shopify.com/s/files/1/0460/0292/9831/files/breathe_angels_and_airwaves_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0440/7453/3014/files/83947884959.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
572f17e337a65172f3c39144c0084f14f7742a8571f63a5574edd258d69271e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 5712 bytes
font_01_sfnt_off0000759d.bin
b84d7dc9589b548e4e0409eb37ac077003df04d3cdd02a8e8b9ccdd93d9f027c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759D 15456 bytes

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