Malicious PDF — malware analysis report

Static analysis result for SHA-256 b011914ccbfa5090…

MALICIOUS

PDF

52.1 KB Created: 2020-08-18 19:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fba07d1cf880a9562b1f6fb81f812b8c SHA-1: f964b55cf13f148165819113b6b76f0dfa5ba278 SHA-256: b011914ccbfa50906ad5e8354e78bb0ab976a99aa6cb5daaba0f5bc9b2fcc799
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, indicative of SEO spam or a link farm. The primary malicious URL identified is ttraff.com, which is known to host redirectors. While the document body contains garbled text, the presence of numerous external links, including to shopify.com and other file hosting services, strongly suggests a malicious intent to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=create+folder+inside+s3+bucket+using+cloudformation
    • http://files.danbonnell.com/uploads/1/3/0/7/130775978/a84484.pdf
    • http://files.belviderestar.org/uploads/1/3/1/3/131379946/bidazizax_duwimuvedol.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0769/files/nebupug.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/68579740687.pdf
    • https://cdn.shopify.com/s/files/1/0433/9705/4631/files/saifonline._saif._com_myclaim_documents.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/11681378977.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/print_september_2020_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/tacoma_traffic_cameras.pdf
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/alone_in_the_universe_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/69123107377.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_off00008085.bin
9c0d56680513ffea370e5e56853802d6870a980328db752dd432dcb58510891b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8085 5612 bytes
font_01_sfnt_off00009383.bin
48deedb694884c0500e64dbdcdca179207e19b94c60170bbba443a35c554ee81
pdf-font-stream PDF embedded font (sfnt) at offset 0x9383 15628 bytes