Malicious PDF — malware analysis report

Static analysis result for SHA-256 06db8b4b5c2734f6…

MALICIOUS

PDF

61.7 KB Created: 2020-08-07 14:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e83c9a784434a1e39d9ace8bd972b57 SHA-1: fa272935079dac3350675bbe95767ffc1b8ce669 SHA-256: 06db8b4b5c2734f6761ebcecc19a45fd24b819941df7d60e15a118ca1b8bb7b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, `https://ttraff.cc/pify?keyword=ielts+speaking+part+1+topics+2020+pdf`, is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector, suggesting the document's purpose is to redirect users to malicious infrastructure.

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=ielts+speaking+part+1+topics+2020+pdf
    • http://files.comfortexperts.net/uploads/1/3/1/8/131871740/3334170.pdf
    • http://files.trustedfinancialpro.com/uploads/1/3/0/7/130739916/7408634.pdf
    • http://files.queenrena88.com/uploads/1/3/1/4/131483445/zejijufawokivawewi.pdf
    • http://files.bloominozzieclicks.com/uploads/1/3/1/4/131437421/vudak-lupelutaxuxe-waditug.pdf
    • http://files.jeffersonhumane.org/uploads/1/3/0/8/130874012/wuwof_tesuzedikomix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5257/1555/files/rejanonoduzaziwagobesurem.pdf
    • https://cdn.shopify.com/s/files/1/0434/2133/5702/files/79071307003.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/fojudesukilowigaweneve.pdf
    • https://cdn.shopify.com/s/files/1/0433/8614/2876/files/50139165988.pdf
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/xosemanipa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73930450062.pdf
    • https://cdn.shopify.com/s/files/1/0428/7807/5036/files/20478396706.pdf
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/kigaro.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/87166942277.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3eb.bin
aa010e02d2ce397fd775e3b9ebf91a0bd83d3a87527fb03e350ce4e8bfb6f8dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EB 5648 bytes
font_01_sfnt_off0000c742.bin
cc1b490e1f311c1ce4112ed7caef27f3bf8def765417c54bb582b1f4591e4cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC742 9936 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.