Malicious PDF — malware analysis report

Static analysis result for SHA-256 d055d226047634ec…

MALICIOUS

PDF

46.6 KB Created: 2020-08-10 10:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7166aa822c565fc3aac62c5beab3fa1 SHA-1: d97fa2eb098bf2d63c97329eab6186a034ed84ad SHA-256: d055d226047634ec415bb5867c23b02fbc0acf2d1275820018a1d387df5fb04b
152 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 likely used to distribute further malware. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure related to 'Beethoven piano sonata pdf'. The presence of numerous external links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious content. No scripts were extracted from this sample.

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.cc/pify?keyword=beethoven+piano+sonata+pdf
    • http://files.claireannagarand.com/uploads/1/3/1/3/131381518/1183138.pdf
    • http://files.joshuabenkingfineart.com/uploads/1/3/2/6/132681507/d2c6a2b003f8.pdf
    • http://files.mosaicsyourway.com/uploads/1/3/1/6/131607321/gabosogutufezad.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/29458703147.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3635/files/ribex.pdf
    • https://cdn.shopify.com/s/files/1/0434/1560/1304/files/pubifupipadimunugogadi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9043/4455/files/sifat_boraks.pdf
    • https://cdn.shopify.com/s/files/1/0451/3264/4505/files/animal_4d_cards.pdf
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/zarilajewabaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/8295/6443/files/the_haunting_of_hill_house_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/8566/7235/files/applications_of_granular_computing.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/seladoverarire.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/gekiwovasatinimowino.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/42879284474.pdf
    • https://cdn.shopify.com/s/files/1/0428/9301/7247/files/31439601348.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/72887073325.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_off000064a2.bin
2ba3d1412dafddb73e9c8c7efd594688d412953653d0f5377fb949f038176e4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A2 5108 bytes
font_01_sfnt_off00007610.bin
1ee6738eca56bb80c06c992e1e4e1429a5e11e5c83bc538cc60cc2e7a2811b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7610 9880 bytes
font_02_sfnt_off0000982a.bin
46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x982A 16120 bytes

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