Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9c5a40485a49de…

MALICIOUS

PDF

41.1 KB Created: 2020-08-18 15:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa7881b1a4a11983e854e79b915bfd24 SHA-1: f27f665f0c3eb549b5a35d13af1c662dccc983da SHA-256: cd9c5a40485a49de0c767f0e458bdfb67aa38ae9c0016490f9dc5070a5783314
152 Risk Score

Malware Insights

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

The PDF file contains a lure for 'free hd movies sites list' and embeds numerous links. One critical heuristic indicates a malicious redirector link to 'ttraff.cc', suggesting a phishing or malware distribution attempt. Another heuristic flags it as a PDF link farm, with many links pointing to Shopify-hosted PDFs, likely for SEO manipulation or to obscure the true malicious intent. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=free+hd+movies++sites+list
    • http://files.ncam.ac.nz/uploads/1/3/0/7/130776788/a94fe6a1c2f25a.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/98872210255.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/44417825655.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4142/files/motorola_minitor_v_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3522/1403/files/kowaziwojofawi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/nepiminokixoxelig.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/delayed_puberty_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/92848998874.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/56571409010.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4719/files/php_ajax_contact_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4981/files/neruvoduzexanaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/4198698845.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_off0000654b.bin
2874693de6e69ac97582377353cb3d8439c3549a950b59dc8a2f853b2114370a
pdf-font-stream PDF embedded font (sfnt) at offset 0x654B 4868 bytes
font_01_sfnt_off000075bd.bin
031160d38c533b96151d2acf56c18580cdeb8df950c9b6920fd6691ce2a04e2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x75BD 10060 bytes