Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafa5e7b60b173b5…

MALICIOUS

PDF

72.6 KB Created: 2020-08-28 04:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98f3204af62999f5b17a105bf39a540f SHA-1: f0ae4a1ab191d298e0289823b6b2066eb0b0acb3 SHA-256: eafa5e7b60b173b5327466b83272eae0eccb3b55d81e2c31493c1c14cbbce07d
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=yes+i+am+avdol'. This indicates the document's primary purpose is to redirect users to a potentially harmful destination. Additionally, the file exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content through multiple benign-looking hosts while masking the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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=yes+i+am+avdol
    • http://files.marneapolo.com/uploads/1/3/2/6/132682585/c732887.pdf
    • http://files.allmongoliantours.com/uploads/1/3/0/7/130739699/pumol.pdf
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/70842410458.pdf
    • https://cdn.shopify.com/s/files/1/0437/3187/8049/files/ashampoo_photo_commander_16_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakuxosisubesabemobaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9573/files/meneforevixafewurudekasi.pdf
    • https://cdn.shopify.com/s/files/1/0447/0964/2394/files/cefalotina_vademecum.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/vunosobibomo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7317/files/16603838001.pdf
    • https://cdn.shopify.com/s/files/1/0432/0906/4603/files/xupediwaza.pdf
    • https://cdn.shopify.com/s/files/1/0437/7480/4119/files/86113889047.pdf
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/munopafozazesagezatufik.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/zitegi.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_off0000c5a7.bin
4f44e5cd46119ed73b4625bc7af41c79bd2c13bcef54ba0f08a8f0e47b4f68e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A7 4144 bytes
font_01_sfnt_off0000d441.bin
7d097c4d66450bef36a1fd277883151cf998d6040470f62d6029ce03f6842abf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD441 4896 bytes
font_02_sfnt_off0000e4e0.bin
4c3f710452705de58fef5da9168bd22a27d1f15ffa48e292d92c070ed0879544		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E0 15572 bytes

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