Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa024acb04c7326…

MALICIOUS

PDF

44.8 KB Created: 2020-08-14 05:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bde498a456281d9f0bb3cab932b87590 SHA-1: dcf87cf6c91d6358b431696ee87fe5cfee71fceb SHA-256: dfa024acb04c73264c95a17afac00df025ca804984c33106d18aa02b5f366727
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=augmented+reality+ebook+pdf'. Additionally, it exhibits a PDF link farm heuristic, suggesting an attempt to distribute content or lure users to various sites. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent.

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=augmented+reality+ebook+pdf
    • http://files.paintingbyme.com/uploads/1/3/1/6/131606349/mumibogi.pdf
    • http://files.parkerscustomcookies.com/uploads/1/3/1/6/131607131/da4fe.pdf
    • http://files.thrivingfamilies.com/uploads/1/3/2/6/132695714/tufewofofuxogizake.pdf
    • http://files.westernmontanafurcenter.com/uploads/1/3/0/7/130740257/c0e8689a946d34e.pdf
    • https://cdn.shopify.com/s/files/1/0434/1871/4264/files/watebelukonigawubasedejad.pdf
    • https://cdn.shopify.com/s/files/1/0431/5335/8999/files/albertine_disparue_en_arabe.pdf
    • https://cdn.shopify.com/s/files/1/0448/2993/3725/files/nowidawava.pdf
    • https://cdn.shopify.com/s/files/1/0439/3828/3678/files/rearrange_pages_acrobat_dc.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/favixudisudilokinutunuvok.pdf
    • https://cdn.shopify.com/s/files/1/0436/6653/8649/files/31951708114.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/19946687683.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/26191535052.pdf
    • https://cdn.shopify.com/s/files/1/0428/3446/0828/files/vugowoseniduj.pdf
    • https://cdn.shopify.com/s/files/1/0454/5308/2782/files/wonok.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/nba_2k_13_xbox_360.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_off0000705c.bin
a042b263db1b9b2111aac4f519370ee8fbb8a8eb2e6a2c0ccac1899a1182f615		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705C 5476 bytes
font_01_sfnt_off000082e8.bin
e0fc07004e7a0726a60345c4c5bd90c41aa34a2a298eb247f71cec0974ef4699		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82E8 10292 bytes

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