Malicious PDF — malware analysis report

Static analysis result for SHA-256 850932938ab7b809…

MALICIOUS

PDF

40.0 KB Created: 2020-09-06 13:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8019a1ac202fb0927cdc92936f5c1c3c SHA-1: f7d545370520ef24dac068133bf9394fc472606a SHA-256: 850932938ab7b809bf6a6df09bbdef5912c1713018390d53620cf86d3208ba65
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for 'Aligarh movie hd free', which is then followed by the malicious URL. The presence of many external PDF links, some benign and some leading to the malicious redirector, indicates a link farm or redirection scheme designed to obscure the final malicious destination.

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.club/wix?keyword=aligarh+movie+hd+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ca9b0a_8ff57631679d427fa497cfc33ffb655f.pdf
    • https://static.usrfiles.com/ugd/4b7290_e0e80288a3f4471884925142ec59bfbe.pdf
    • https://static.usrfiles.com/ugd/b926a8_112908993a234f0eab2dcaeb731a1c64.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_abb492b2f041440dad29c002d774434b.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b90e902b8b4aa9ade104185c577f00.pdf
    • https://static.usrfiles.com/ugd/ab059d_8b03af8cc8954388b1f87ef3ab6f6c43.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/20328893372.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8277/files/simap.pdf
    • https://static.usrfiles.com/ugd/08fe48_432ac839d49545f7b13b4b5fef6b0597.pdf
    • https://static.usrfiles.com/ugd/1f2646_9e4db257d0de43aab7cf3e38dc476b31.pdf
    • https://static.usrfiles.com/ugd/0e6328_999b3a2d83a64392bed4730107e52fd6.pdf
    • https://static.usrfiles.com/ugd/73c254_31fb223bb9494800a54f5ed0c3254497.pdf
    • https://static.usrfiles.com/ugd/8a419d_023af371acd849ca889df4034d5a908d.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a34.bin
e107e85a245329018e8a1f14db8a8e0ba331c9c5cd06f7d66724c36d8c59bbb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A34 5192 bytes
font_01_sfnt_off00005bbd.bin
253bf46ad3f555b829b3ab88e87571413ae1d3dc11dc9cab5a0dfb4a2d6250fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBD 10060 bytes
font_02_sfnt_off00007e1f.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1F 16164 bytes

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