Malicious PDF — malware analysis report

Static analysis result for SHA-256 45085f0b47b9715e…

MALICIOUS

PDF

56.3 KB Created: 2020-08-30 07:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0f68deeac093f8e53ed0f43258452a7 SHA-1: 4df068796ec66fc226a0384ce1f514ac7e2cba35 SHA-256: 45085f0b47b9715ef4bc0d862a96070406b33893d38b31d20ffd73fe8e29a075
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is presented with a deceptive keyword. The document body, though heavily obfuscated, contains the same URL and a list of other URLs hosted on cdn.shopify.com, likely intended to appear legitimate. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious intent to lure users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=sean+paul+amor+eterno+descargar
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/64968814751.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7305/files/calendario_2020_gratis_da_stampare.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/call_forwarding_app_for_android_phone.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/adiemus_chords.pdf
    • https://cdn.shopify.com/s/files/1/0437/5114/5626/files/9211120853.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/31984218913.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b45f645a8f446e1a05ee991c4a83db5.pdf
    • https://static.usrfiles.com/ugd/b8c837_60117dac7607460884c8cc948294237b.pdf
    • https://static.usrfiles.com/ugd/97634b_2fc962908c6f43a4974fb0011c58336a.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb8444e3457a4832bae96b7ddb14674a.pdf
    • https://static.usrfiles.com/ugd/4dd980_76b1b6b6c69f4067b7bd27a1f61510a4.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://www.facebook.com/
    • 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057af.bin
120dfd7c7977cfb9a90e0c19aa24ce80f3ad63f69756627d616fe21accc03e95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57AF 6424 bytes
font_01_sfnt_off00006791.bin
4df751e5e28733a805410ddf5d5f41e331bf5c55d756d23ddbead3b845da0de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6791 5496 bytes
font_02_sfnt_off00007a19.bin
372ff3f3759db8e605627a3e3c827d07deab61ce5c1797e9894f2292549d54bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A19 5276 bytes
font_03_sfnt_off00008d57.bin
b998a3f3b9b7620b7d0409d5979ba47faaceae02b7acdae3621b0c4726154524		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D57 11600 bytes
font_04_sfnt_off0000b372.bin
e4a5a6a61265cbe6c0932089059cb53da9df7dc8caedaa4edebc398464311152		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB372 16620 bytes
font_05_sfnt_off0000ca44.bin
0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA44 1736 bytes

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