Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc298944dad7220…

MALICIOUS

PDF

45.6 KB Created: 2020-08-15 08:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adda4c1e669fe96a94422d8c34b830f8 SHA-1: 292f5540c80955646fb1277da820b77c1dd27a1e SHA-256: afc298944dad7220540d70e8733ec4356fd0cc632c1605fab1a8e0e9aa6b102f
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Cardboard dog mask template' and the malicious URL, suggesting a lure for users to download a template. The presence of a malicious redirector indicates an attempt to lead the user to a further malicious resource. No scripts were extracted from this sample.

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.ru/pify?keyword=cardboard+dog+mask+template
    • http://dupuvab.bethchrismanmusic.com/uploads/1/3/1/1/131164250/gakugewuwowajig.pdf
    • https://cdn.shopify.com/s/files/1/0434/4633/7693/files/veginozuseduz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/26977677036.pdf
    • https://cdn.shopify.com/s/files/1/0435/9979/0243/files/mepadazedusidibami.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/58482733653.pdf
    • https://cdn.shopify.com/s/files/1/0435/7609/8975/files/1287319546.pdf
    • https://cdn.shopify.com/s/files/1/0450/6681/3590/files/powerpoint_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/sidetelox.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/38183062224.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/58104110074.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53293114795.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/filukipejazowexotago.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.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_off00006819.bin
ce8d2ca78be0a8ae69a31b82690cf38e9f72a0b175e0699ddb2c7a0def40fabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6819 5140 bytes
font_01_sfnt_off00007999.bin
75247c1830ff8570dedf02df78ce013ece96114e9b81fcd5b9a7e2c77f47dbcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7999 10008 bytes
font_02_sfnt_off00009bcb.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCB 4324 bytes

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