Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ba6a05f4ad5d43…

MALICIOUS

PDF

43.6 KB Created: 2020-09-02 07:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e32a4daa95980e2651ba448aac2a72b SHA-1: fb4e1346ab01e7dc81541c8fdb70322732fbdeb7 SHA-256: c6ba6a05f4ad5d436f5aa27bed978122f25cb2838a3393f34bf25af266bce82c
152 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 ttraff.ru. The document body, though heavily obfuscated, contains text related to 'Avatar 1 full movie in tamil' and the malicious URL, suggesting a lure for users to click the link. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign but likely serve to mask the malicious redirector.

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=avatar+1+full+movie++in+tamil
    • https://static.usrfiles.com/ugd/a31856_a954d8210c1a4d75a19dab60cdfe37b0.pdf
    • https://static.usrfiles.com/ugd/ee6770_a7a610fd68bc44bb84fc250badd15a8f.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_80634cc29fdd4ca9949e07ea4c687b79.pdf
    • https://static.usrfiles.com/ugd/0cd019_89c76b67287a49b0b2bfd01bfa134b4b.pdf
    • https://cdn.shopify.com/s/files/1/0430/8438/2357/files/46169609061.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/bhakta_tukaram_cinema_telugu_movie.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/89218397542.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/bus_network_topology.pdf
    • https://cdn.shopify.com/s/files/1/0448/3697/8849/files/road_map_of_nepal.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/divinugor.pdf
    • https://static.usrfiles.com/ugd/b8c837_8758fbd13a154e019d46c88081db4d8f.pdf
    • https://static.usrfiles.com/ugd/764aaa_c5ab1033c1344555a9cc94d597c9760b.pdf
    • https://static.usrfiles.com/ugd/b0b521_8f86e76338174a23911f89e0c04a3c9a.pdf
    • https://static.usrfiles.com/ugd/a2e20a_92056c7b01ac48dc802cadf1f82f8311.pdf
    • https://static.usrfiles.com/ugd/d4579c_f378fb11f7f34ddf9869814b2d9f6b83.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_off0000622a.bin
6ff09fc8f32dae5c2b0ba18518671e4c3ffc3bf9d893c64cdc42a579b4ac6aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622A 4836 bytes
font_01_sfnt_off00007291.bin
c206ac4eca120f096112d408dff6b33a2f721090936d80486df636e1cd240fde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7291 2656 bytes
font_02_sfnt_off00007d99.bin
c1f950917e01cb881fddfe208dbe9acd44f99a9a893da9ba05ff1c5150b79128		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D99 10436 bytes

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