Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c74d906417ff12…

MALICIOUS

PDF

56.0 KB Created: 2020-07-31 17:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 153e96e90fe369b75bbd360e601cb6c2 SHA-1: 58914ff66cf8e3aa47a8c6e245b7f1d8b79cc528 SHA-256: c7c74d906417ff126d58d318a2b7aa6691ac66e263b377126ba687b74a4add7b
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a heuristic identifying it as a PDF link farm. Many of these links point to Shopify-hosted PDFs, suggesting an attempt to artificially inflate search engine results or distribute content. One critical heuristic indicates a link to known malicious redirector infrastructure at 'ttraff.ru'. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=osrs+ping+checker
    • http://files.exploringoverload.com/uploads/1/3/1/3/131383255/wijirenejasewo_wezuwurebejusi_seguzuvoweti_vunok.pdf
    • http://files.drivenbrand.com/uploads/1/3/1/4/131438539/3353507.pdf
    • http://files.hlfmgoats.com/uploads/1/3/1/3/131383553/jopaxubesoz.pdf
    • http://files.ankatriencasselman.com/uploads/1/3/1/4/131437889/8f3519.pdf
    • http://files.libbyfarrelly.com/uploads/1/3/2/6/132683267/vimofamemusiv_pofonuvo_zesili_kelopesugujop.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/nofitipe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/49708745663.pdf
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/wukarona.pdf
    • https://cdn.shopify.com/s/files/1/0435/5611/0487/files/zadasa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4665/files/9988291088.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/33472427422.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebisineseboji.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/81198041261.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/22306732385.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1958/files/gowiluzofatuki.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/giwifivesewupiketejefodo.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_off00009c64.bin
c1e35e1beb0a622ed13c579c5b41c0294eaff2ac77865a59a91b530419f01ab7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C64 5044 bytes
font_01_sfnt_off0000ad8d.bin
0abf558470db9c8912544b936c442a3880e6183dde5d35b094c913833509b75f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD8D 10960 bytes