Malicious PDF — malware analysis report

Static analysis result for SHA-256 51185a7f0ad56eed…

MALICIOUS

PDF

35.5 KB Created: 2020-08-31 06:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3321343415f8a96ba9ae715d54ee016 SHA-1: dbc4ca01345e3784c73fa8c2bc52fa648f7f2977 SHA-256: 51185a7f0ad56eed386a2b15ab42018d9f13bb383cf3c4a500a0f34624c28f6b
154 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a search result for 'Chhota bheem movie video mp4'. This link redirects to a known malicious URL, ttraff.ru, which is likely part of a phishing or malware distribution scheme. The PDF also contains a large number of other embedded links, many pointing to static.usrfiles.com, suggesting a link farm or redirection infrastructure.

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=chhota+bheem+movie+video++mp4
    • https://static.usrfiles.com/ugd/b8c837_8656f02880364090bf7434a8ffa19d66.pdf
    • https://static.usrfiles.com/ugd/b88e3d_99afb3f2b7654229b9d3ad1eaef5ef70.pdf
    • https://static.usrfiles.com/ugd/d216cb_7ef50e71e652481ea6445e6b44227a72.pdf
    • https://static.usrfiles.com/ugd/77941b_441bd6ca0f9148309a6ab755108f32b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_27e7badc137c433c9697aaf95c72375f.pdf
    • https://static.usrfiles.com/ugd/097bd5_a37f5aac8d0a4a048cac47e63657b69d.pdf
    • https://cdn.shopify.com/s/files/1/0433/4010/3845/files/cpr_guidelines_aha_2015.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/mimizudakozemudofuvowug.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0435/files/sonesafuvem.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/rilavovisovo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/13571287954.pdf
    • https://cdn.shopify.com/s/files/1/0456/9146/9983/files/burnout_dominator_psp_cso_free.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_off000044fa.bin
b607c077ddd0f7e783fa916c9d387d04670e278ac0832549f1ea01c80ca22997
pdf-font-stream PDF embedded font (sfnt) at offset 0x44FA 5084 bytes
font_01_sfnt_off0000562b.bin
980027f14f62b7cc948d760f08f2a36b19a3581a6dd901e74540fe3161af22f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x562B 9592 bytes
font_02_sfnt_off0000771d.bin
27111c5dd9048bcb0ef3c67e22ba9b451112fd663b9767b43a9799ff9faf4001
pdf-font-stream PDF embedded font (sfnt) at offset 0x771D 2432 bytes