Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfbd6bd03c124272…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 01:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb3fa1306e2668a029b8b038850a6699 SHA-1: a1d922585964552c660e3125cd50f9d3d0c63ce0 SHA-256: cfbd6bd03c124272f9d8c6014c949a30788076b6312196ea077c9ab415376e5f
154 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 'https://ttraff.cc/wix?keyword=ittefaq+full+movie+download'. This URL is presented within the document body, suggesting a social engineering lure for movie downloads. The presence of a large number of external PDF links, many pointing to Shopify domains, further supports the link farm heuristic. 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.cc/wix?keyword=ittefaq+full+movie+download
    • https://static.usrfiles.com/ugd/b5aed9_46089ec1d41e4240a65f1e1ae388701a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5cd7b02488f4d298ef00202ec2908f0.pdf
    • https://static.usrfiles.com/ugd/93c935_f667f13238b640e7bf96fbaf168f5f3c.pdf
    • https://static.usrfiles.com/ugd/e5a943_6ac1814965254e718ab2a5e200051149.pdf
    • https://cdn.shopify.com/s/files/1/0434/7691/0242/files/sketch_website_mockup_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/3382/1347/files/jafasu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7627/2796/files/bending_moment_derivation.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1034/files/rajoxutivomasinawum.pdf
    • https://cdn.shopify.com/s/files/1/0434/1235/7270/files/article_370_and_35a_in_english.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_off0000619c.bin
b490fb9c3086dfc9f12ff73948c889e13c3ffb33e8a595bf705f9383403832ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x619C 4996 bytes
font_01_sfnt_off000072a1.bin
89608da8bedc83b9435ebf71789cde95a4c0db217eada29c3f77f3c586f21c77
pdf-font-stream PDF embedded font (sfnt) at offset 0x72A1 9812 bytes
font_02_sfnt_off00009465.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9465 16164 bytes