Malicious PDF — malware analysis report

Static analysis result for SHA-256 e467e3b07a271b19…

MALICIOUS

PDF

134.2 KB Created: 2020-08-15 03:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6e688cd89a035e3f4d01754de09c227 SHA-1: 39cec9ccb207f62850869d822e98dc2c6c494a06 SHA-256: e467e3b07a271b19ff3370bfa3375abc2b1621367bdb22a3ab02550971bf367c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for linking to a known malicious redirector, ttraff.ru. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources, many hosted on Shopify. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=inventions+list+pdf, reinforcing the malicious intent. The primary attack pattern involves luring the user to this malicious URL.

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/pify?keyword=inventions+list+pdf
    • http://files.aviationsecuritymanagement.com/uploads/1/3/1/1/131163945/305fc0013a1.pdf
    • http://koxelez.everkincritters.com/uploads/1/3/0/8/130874284/6f3d3e93675.pdf
    • http://files.neciasnotables.com/uploads/1/3/1/4/131453540/nakuna_mevevuvevuxidu_tazupewofo_lunirosejugix.pdf
    • http://mevibov.amandawhetstone.com/uploads/1/3/1/6/131637814/7736462.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/269962440.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0446/3663/5299/files/landslide_lyrics_oh_wonder.pdf
    • https://cdn.shopify.com/s/files/1/0433/3751/5176/files/58030141702.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/dijowepajot.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/11475955396.pdf
    • https://cdn.shopify.com/s/files/1/0432/4016/1435/files/agnes_martin_lugand_libros.pdf
    • https://cdn.shopify.com/s/files/1/0437/3816/9498/files/23577371183.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/gonizal.pdf
    • https://cdn.shopify.com/s/files/1/0438/1668/1629/files/org._apache._poi._xwpf._converter..converter_jar_download.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_off0001b8d8.bin
5d9f804f8f7e1fb58b1f39421ae16b6e4f6c064c87afe046977b1c87ae440d6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8D8 4052 bytes
font_01_sfnt_off0001c6f7.bin
63c2e8a0d9a57c2d4c098a40228428d687e8f998592974497aeb924c56bd21a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6F7 4728 bytes
font_02_sfnt_off0001d728.bin
fbacbeedf7f60492b07f2e32670ada08bfc662f208f5fab5b42b903b6084b2aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D728 18468 bytes

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