Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdae37d78e60e01f…

MALICIOUS

PDF

84.1 KB Created: 2020-09-04 02:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2309c084dfdfd0bedd6d260954c130fe SHA-1: 724f296c072f0570014ad2a60aaabc5386d52135 SHA-256: bdae37d78e60e01f185c648db62096fcce4853de72fc1fe4ce170cec039e7a6c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a movie download link. This suggests a phishing or social engineering attack aimed at directing users to malicious content. The PDF also contains a large number of external links, many pointing to static.usrfiles.com, indicating a link farm strategy. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=new+movies+hd++2019+bollywood
    • https://static.usrfiles.com/ugd/b8c837_5256334a210048ee94a97f102978c2ba.pdf
    • https://static.usrfiles.com/ugd/0a0016_ea311759c76d4c1ab270e73c7092950b.pdf
    • https://static.usrfiles.com/ugd/5b9365_b4bf13171f934803be2b49fe7bbb42f8.pdf
    • https://cdn.shopify.com/s/files/1/0461/1591/3892/files/sibozudib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90067119925.pdf
    • https://static.usrfiles.com/ugd/9edd50_52c2f979517c4ee1b34008b3d7cb54ab.pdf
    • https://static.usrfiles.com/ugd/ea2f88_02090b65a3d940208de10454d31c4877.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ed2ea15a0cd4167ab7d6c4bb16740d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_60f4ede20a4144f5b5a21b7249dfbbcc.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac4be774ca5b438e9e2f23ee1d73a232.pdf
    • https://static.usrfiles.com/ugd/1f6d71_a984db2a557546cba844f6e1aa6bdd5e.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d97d.bin
5c5b273ecc6c6874471bd3943e7488720544f71d1729007503673fec17c6700d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD97D 5604 bytes
font_01_sfnt_off0000ec86.bin
c25b113874322ec53c3fff60a83dde94c48453ab69d814d84a43687bb91a8cbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC86 11220 bytes
font_02_sfnt_off000112fe.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0x112FE 16164 bytes
font_03_sfnt_off0001284f.bin
15df1b99212833394df95b7402f0cd2f2a19568ebbdf46ef18d590dd860d5356
pdf-font-stream PDF embedded font (sfnt) at offset 0x1284F 7720 bytes