Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff74e016884cd13f…

MALICIOUS

PDF

37.5 KB Created: 2020-08-31 09:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32958acc864074fd5c6d9b4883f1139a SHA-1: 31f1edece838d767ebada603d0a6a4542479a4f8 SHA-256: ff74e016884cd13fe9872279dac2a28d9ecffe55f68f1df348621870152a1e59
152 Risk Score

Malware Insights

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

The PDF contains a link that is disguised as a movie title, likely to trick users into clicking it. This link redirects to a known malicious domain, ttraff.ru, which is flagged as a redirector. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites. The ML classifier strongly indicates 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.ru/wix?keyword=her+infidelity+2015+full+movie+onlin
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/88432733966.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/2mm_aluminium_sheet_uk.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9361/files/39668168107.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/biblia_cristiana_evangelica.pdf
    • https://cdn.shopify.com/s/files/1/0440/7505/7302/files/notes_of_atoms_and_molecules_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/2005_suzuki_gsx600f_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/22321009770.pdf
    • https://static.usrfiles.com/ugd/451461_4240cffaac654bcbb8cd0755d3e2f998.pdf
    • https://static.usrfiles.com/ugd/d775a9_93826baa63df4423b995434807fb08ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_8afa378f9c414a4cad1c4fd2df8203d2.pdf
    • https://static.usrfiles.com/ugd/98e298_db3309a797aa43938ba0cb8a04610bb0.pdf
    • https://cdn.shopify.com/s/files/1/0432/4655/1208/files/muscle_pharm_workout.pdf
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/bytearrayinputstream_to_file_java.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/cost_accounting_short_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetitoditasenubekuxon.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_off00005294.bin
32c21bc99b654bd02f41be9cc1b2521e7dbdbc479454b17cfd63e594ec0492da
pdf-font-stream PDF embedded font (sfnt) at offset 0x5294 5236 bytes
font_01_sfnt_off0000646a.bin
6fc8ecbe4432bfe1cfc5807a75ceb967460c95aec936ece8fc1af48e7364ad6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x646A 10756 bytes