Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40cdb8d2dea5312…

MALICIOUS

PDF

41.8 KB Created: 2020-08-21 03:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 277a545fcf2841b117bf58cc070e5679 SHA-1: 0bb13a684dd90d48b01881a77167807075ec30fb SHA-256: f40cdb8d2dea5312a2fbce7441c0ea3d9a298058d44c93337281895bde0b156d
154 Risk Score

Malware Insights

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

The PDF file contains a lure for 'Full hd movie video song' and embeds numerous links. One critical heuristic indicates a malicious redirector link to 'ttraff.com', suggesting a phishing or malware distribution attempt. Another heuristic flags a PDF link farm, with many links pointing to Shopify-hosted PDFs, likely for SEO poisoning or to obscure malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URLs and heuristics indicate a malicious redirection and link-farming attack pattern.

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=full+hd+movie+video+song
    • http://weposa.melbatheater.org/uploads/1/3/1/8/131856917/xutekuvakujifebos.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/23408131990.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/34198079581.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/tulamonologolazorabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/kiduvajusoxitana.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/autocad_3d_notes_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/galikirawuvelonotefigi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevimofurerofujasopam.pdf
    • https://cdn.shopify.com/s/files/1/0439/1393/7064/files/bendy_ink_machine_song.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_off0000674b.bin
5b01d78f6f2b16cacb3a6250ac9efbc48306e362e923b0aa1d1c2358dc79e50e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674B 4948 bytes
font_01_sfnt_off00007809.bin
10ca3959584eb01daf88ed9685dda1e5e2326e8adc9c97ccff1db1fbca787e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7809 10236 bytes

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