Malicious PDF — malware analysis report

Static analysis result for SHA-256 0054f0d615f76024…

MALICIOUS

PDF

35.4 KB Created: 2020-08-30 16:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baed0f0b29f5d8401e822e78930678ef SHA-1: 771949e2e8cbe06d16012ad2d48737e35996d70f SHA-256: 0054f0d615f76024bf6fa9868aac4909be24f55b32d5e54ca53034f3c8bae5d8
154 Risk Score

Malware Insights

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

The PDF contains numerous links, identified as a link farm, with one critical link pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'piano sheet music free' and the malicious URL, suggesting a lure to a phishing or malware distribution site. 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.com/wix?keyword=sinking+deep+hillsong+piano+sheet+music+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f967ac_b518a2e721e444cb885a974d24d5b42a.pdf
    • https://static.usrfiles.com/ugd/3aca14_1cdf46176b994c968d4b25d348b3a9e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ef679854fea45288d56e30c085e44bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_67761bb8f012408c89f3071306faa2bc.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2156/files/10293255585.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/tiwidezeleraw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7128/3098/files/demon_hunter_guide_8._0._1.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3318/files/47497468166.pdf
    • https://cdn.shopify.com/s/files/1/0438/6550/5952/files/26459090909.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/lamere.pdf
    • https://cdn.shopify.com/s/files/1/0434/5777/3725/files/82804742403.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/funagorabiwa.pdf
    • https://cdn.shopify.com/s/files/1/0440/6856/9238/files/psych_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89349082521.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1326/files/71737880503.pdf
    • https://cdn.shopify.com/s/files/1/0434/1835/3821/files/miranda_cogrove_about_you_now.pdf
    • https://cdn.shopify.com/s/files/1/0438/5567/5552/files/what_does_a_piccolo_sound_like.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/25004588296.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b28.bin
fae80f9e2f9cea4fd6f1f962689976bece9946e2b03f7dde810888a9cc490f9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B28 5736 bytes
font_01_sfnt_off00005e84.bin
27f8f98633a81306428eac423915929a205860c0430a7fb792e388d6a9dcb12f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E84 9804 bytes

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