Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd6982ed404d54c…

MALICIOUS

PDF

40.8 KB Created: 2020-08-06 15:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8d75ac9736e9ebb0278fb10b45453bb SHA-1: 40a27f00b4670ca0db1a957da55aee4d6a74c4da SHA-256: afd6982ed404d54c187aa3fc422d205bd95bc288966f8b61d07e9264086f0c7c
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. The document body, though partially corrupted, contains text related to 'foreign literature about absenteeism in the philippines pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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=foreign+literature+about+absenteeism+in+the+philippines+pdf
    • http://files.makeupbytessmiller.com/uploads/1/3/1/6/131606260/wevolitunewu-vujilunenisorix.pdf
    • http://zujalibur.davidyek.com/uploads/1/3/1/6/131606552/3090840.pdf
    • http://files.qaradaki.com/uploads/1/3/1/1/131164236/266f0a8.pdf
    • http://files.newrevelationchurchil.org/uploads/1/3/2/8/132814674/kudalijobulepakavoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8081/8581/files/liwarodojon.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/anteproyecto_de_investigacion.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/php_line_break.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/dizenebekukigenitabi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3035/5866/files/96648766206.pdf
    • https://cdn.shopify.com/s/files/1/0435/2173/6859/files/xuwimepopodowig.pdf
    • https://cdn.shopify.com/s/files/1/0432/7840/1700/files/78610789378.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/8744991134.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/57590292736.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/34993152360.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/ludoribojananepuwowipol.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_off00005331.bin
ca21cdbf6b10fef7901e34b1421a8e57515c95c97ec58386cc750966f77d0f61
pdf-font-stream PDF embedded font (sfnt) at offset 0x5331 5432 bytes
font_01_sfnt_off00006576.bin
68e87422791da696ee4d1f540591aa7a3473cb2e93df194411962464b2c78cf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6576 10064 bytes
font_02_sfnt_off000087d3.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x87D3 4324 bytes