Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6983d688dde3a02…

MALICIOUS

PDF

48.4 KB Created: 2020-07-28 16:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d628ca737ccb86548bc1c3bd0da4e184 SHA-1: 7a020d514b2e32908f656963293ffabb052227d3 SHA-256: f6983d688dde3a02bcf3e463c2225d5d5e62338020fd6a2a4c1b254a790a97b7
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous links hosted on 'cdn.shopify.com', suggesting an attempt to generate traffic or distribute further malicious content. The ML classifier also strongly indicated maliciousness.

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=alcatel+pixi+4+manual+espa%25C3%25B1ol
    • http://files.selahchurch.com/uploads/1/3/2/8/132814949/takaxud.pdf
    • http://files.texasbrowndog.com/uploads/1/3/2/6/132695397/vibudinuzu-pesilenujudufi.pdf
    • http://files.autumnrae.net/uploads/1/3/0/7/130739027/6535216.pdf
    • https://cdn.shopify.com/s/files/1/0433/3332/0872/files/domomemoruw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/73150815753.pdf
    • https://cdn.shopify.com/s/files/1/0437/4652/5338/files/5463338281.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/23116034656.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6666/files/lowevuligegulatuladadim.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/dorariba.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/948740237.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/5978425373.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/20463820589.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/60096296550.pdf
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/49299487806.pdf
    • https://cdn.shopify.com/s/files/1/0430/7589/5450/files/zepazusuno.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065fe.bin
ce22c8eaa1f53a77d563481fc3f0abc202627ce0e69ac912df19b60822d178aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x65FE 3724 bytes
font_01_sfnt_off0000733b.bin
2a5fe3438f676d4e824e0a5c2775e95755076f1a9ca9b4d3200405083a9d225a
pdf-font-stream PDF embedded font (sfnt) at offset 0x733B 5224 bytes
font_02_sfnt_off000084ad.bin
8fb6b2c32057f46e6c1406a6ca9ecc994a56b6e6aac4962d54043109a66f6942
pdf-font-stream PDF embedded font (sfnt) at offset 0x84AD 14608 bytes