Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce3cfb2703b02ae…

MALICIOUS

PDF

40.9 KB Created: 2020-08-03 16:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdda374def67441092352d630cc3e0ee SHA-1: 26ca9e76a472a38470d7b906b8b8d234644937e4 SHA-256: 2ce3cfb2703b02ae266c27840c92ff3c90ae60d1a46a13bd2a2eb2be0577a18f
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=wire+gauge+to+mm+pdf'. Additionally, it features a large number of embedded links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and other PDF links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=wire+gauge+to+mm+pdf
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
    • http://files.vibeperformingarts.net/uploads/1/3/0/7/130776769/tiwamowuzapo.pdf
    • http://files.fitintegrity.com/uploads/1/3/0/9/130969151/taxagoxuso.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/steelhax_nintendo_3ds.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/90514179646.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7913659608.pdf
    • https://cdn.shopify.com/s/files/1/0437/9626/7168/files/sobonukovedoxenej.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/samalibuwajisuvakuzoxuku.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/70439690993.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/kowolagil.pdf
    • https://cdn.shopify.com/s/files/1/0432/5074/5512/files/nagurilapisaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1600/files/vevijasuleno.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/80399538924.pdf
    • https://cdn.shopify.com/s/files/1/0432/1250/5243/files/jumemivabekonixijasukuza.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/
    • https://cdn.shopify.com/s/files/1/0437/9626/71

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632b.bin
ea8caf64f499eb9e2210752892239332213c33902be0b1dd639bfe435356b2a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632B 5164 bytes
font_01_sfnt_off000074b9.bin
dfb1df54283700f5e0b610597785fdaed00920bb309ac0c7e755751f23d796b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B9 10032 bytes

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