Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95233330d425ce0…

MALICIOUS

PDF

55.8 KB Created: 2020-07-31 02:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e022c86bc9b055d0bdd3a1b67ea1097c SHA-1: fd34fe1c8dbb980784a0cd75ad1aa85ea9c18b6e SHA-256: b95233330d425ce0ab27675cc693ec4fc3ec72fadb990c4fbc9cc1bca0b52d50
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. This heuristic, combined with the ML classifier flagging the document as malicious, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to PDF generation, indicating it's likely a lure document. The presence of numerous external links, including a link farm on Shopify, further supports the malicious intent.

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/pify?keyword=campfire+songs+guitar+chords+pdf
    • http://files.clgagolf.org/uploads/1/3/2/6/132681887/8427291.pdf
    • http://files.meant2be.ca/uploads/1/3/0/8/130815228/9374258.pdf
    • http://files.balasmontessorischool.com/uploads/1/3/1/0/131071137/xevosuzamevezivadiz.pdf
    • http://files.senecaswissys.com/uploads/1/3/0/8/130813111/b2744.pdf
    • http://files.teresamummert.com/uploads/1/3/1/1/131163512/tukafuna-duxogozegexete-valarubug.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6258/files/23422711809.pdf
    • https://cdn.shopify.com/s/files/1/0438/4758/1856/files/sixopap.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/41597305638.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/pigosiderinatamilexinavi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2621/files/54151839658.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/71916966431.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/39470489201.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/ripazinaleluki.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/47001081468.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/14894400276.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24413790208.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/44858743962.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/zalowajujinulofowu.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_off000093be.bin
5f7e8b9f337a81e5a49484ad36e37b91c7d0b013c36b18f7908a262bd130791a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93BE 5440 bytes
font_01_sfnt_off0000a610.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA610 1800 bytes
font_02_sfnt_off0000ae9e.bin
8bbb532839e46fb3f9bd5227b2df98a847ae2e051c457336623cf445805ada81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9E 10104 bytes

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