Malicious PDF — malware analysis report

Static analysis result for SHA-256 5056ff16108aff5f…

MALICIOUS

PDF

35.3 KB Created: 2020-08-17 05:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a2cec6b396a683efa734afe7a547373 SHA-1: 3fe2b2a1fae41444400230abc0eecbfa56fab8cb SHA-256: 5056ff16108aff5f3564ec7c64d7e941137d45487c7145e317bcfee4eba28741
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and references sheet music, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, with the primary malicious link being the redirector. The ML classifier strongly supports the malicious nature of this PDF.

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=breathe+me+sia+sheet+music+free
    • http://xatawuxoz.edenhansenphotography.com/uploads/1/3/2/8/132814940/cede482a4.pdf
    • http://pubat.breakersgorey.com/uploads/1/3/0/7/130776228/demasakajirepedufij.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1170/files/bepozodifalowaloto.pdf
    • https://cdn.shopify.com/s/files/1/0428/5323/6902/files/formal_and_informal_email_writing_examples.pdf
    • https://cdn.shopify.com/s/files/1/0444/8036/4711/files/ruthless_trust_brennan_manning.pdf
    • https://cdn.shopify.com/s/files/1/0435/6109/1221/files/51766558259.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2524/files/post_analytic_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3885/files/plant_virology_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/14799317461.pdf
    • https://cdn.shopify.com/s/files/1/0429/0225/7823/files/how_to_download_from_pornhub.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/daliwejatofitatos.pdf
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/kijodigapezedof.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/answer_key_of_upsc_exam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/wanijalorebikup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0848/2724/files/94100244402.pdf
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/zabijalate.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bd0.bin
80ca797670d65b812d4e4968100cd3014652804516ed2ef6a0c0e234ec9d996c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD0 5136 bytes
font_01_sfnt_off00005d20.bin
ab8fc97cffa93b86209d674a8fe4d6309fe1c3c4e2b7c23e6a90c8b07a79b0bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D20 10376 bytes

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