Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a41c6ca04c1b69…

MALICIOUS

PDF

42.1 KB Created: 2020-08-06 07:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7fd98fc9c3de2a1c011eab994774538 SHA-1: 793ff77483c5bfc59d2240044902eebbf333c4ab SHA-256: 32a41c6ca04c1b69119255b7ab33febc3598f51ba7f3767eb6178df6cccbdc96
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.com. The document body, though partially corrupted, includes the text 'Fisiopatologia del cancer de utero pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=fisiopatologia+del+cancer+de+utero+pdf
    • http://files.hikingnewfoundland.com/uploads/1/3/2/6/132695244/gulax.pdf
    • http://files.masonluke.com/uploads/1/3/2/3/132303229/4564962.pdf
    • http://files.companionanimalnorfolk.com/uploads/1/3/2/6/132682862/0558ac9.pdf
    • https://cdn.shopify.com/s/files/1/0432/4782/9156/files/kaximoxowuzoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/jopitowegozeroza.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/18162189890.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/fitinof.pdf
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/22380347659.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/zufusovikewusemamus.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2665/files/chinese_candlesticks.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/58631955537.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0460/files/golurulogetixo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wojifuxazax.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/46079120194.pdf
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/rusagulo.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_off000063e0.bin
267ba26d853db6d656d414dcdb40446accad5cab748319090e9a545e8732cf35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E0 5276 bytes
font_01_sfnt_off000075e3.bin
74b0a6cd5aedc63460b03a670a731e9f318348fa96b1e7c2edcbf17d691a59aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E3 10952 bytes

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