Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf5fd16124482fa…

MALICIOUS

PDF

45.5 KB Created: 2020-07-24 08:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7f887a5742a900378d9b049bc75039b SHA-1: 6c2b5b786ccb8293da16c9bc341306106e12e85a SHA-256: ecf5fd16124482fa297a54e36b2285af465024820e17699ada45f9f819eb5465
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to 'ttraff.cc'. This URL is used in a lure related to a software installation guide. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. 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.cc/pify?keyword=wily+introscope+installation+guide+9.+7
    • http://files.healthandculture.net/uploads/1/3/0/7/130775704/wokopajububamaxipare.pdf
    • http://files.futurereadyacademy.org/uploads/1/3/2/6/132682685/vuzaxizariforub-jegudoti-bemad-fozalin.pdf
    • http://files.lwmphotography.co.uk/uploads/1/3/1/3/131383613/2421267.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3756/files/romapivod.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/nuwoxelajezirax.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/95957658391.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/12660148691.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/tobapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6742/4412/files/jesapogonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0407/5933/files/gidifiremawipugom.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6511/files/todoridikolirabolozik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/novorubafiwani.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/xorenemifibajojunupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3898/files/49652410088.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/
    • https://cdn.shopify.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000715d.bin
acd14b924f84ad8458446600441f8791ee78fd37529b21bd3765f6c9bc2d8c83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715D 5504 bytes
font_01_sfnt_off0000843a.bin
aabd266de3afe65cb8787f9bbb08e09fd577490e6232fb49268a7f1ca19b9601		 pdf-font-stream PDF embedded font (sfnt) at offset 0x843A 10960 bytes

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