Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a77bd03916ae487…

MALICIOUS

PDF

43.5 KB Created: 2020-08-09 07:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b490179e1e3c50f95be59483692b0151 SHA-1: a41ab4e969f760ff1a3f0ff87e8b592e82b64e75 SHA-256: 7a77bd03916ae4879fe67fbd7b605d8e41facf6317ad7fc281b27470b2ac0da8
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to a malicious site. The PDF also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly indicate a phishing or malware distribution attempt.

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=angielski+s%25C5%2582ownik+obrazkowy+dla+dzieci+pdf
    • http://files.punxsutawneylibrary.org/uploads/1/3/1/4/131410736/bimupenutifawodon.pdf
    • http://files.opwtcstockton.com/uploads/1/3/1/0/131070762/begajawujipili-nazigam-wefukemo.pdf
    • http://sadowab.riveraservices.org/uploads/1/3/1/4/131453284/8041327.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/divinity_original_sin_2_black_screen.pdf
    • https://cdn.shopify.com/s/files/1/0432/1021/1491/files/minolta_srt_201.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/a320_cockpit_layout.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/44323436966.pdf
    • https://cdn.shopify.com/s/files/1/0434/7812/2649/files/spiegel_fourier_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/sunilejanawojimiwuna.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.pdf
    • https://cdn.shopify.com/s/files/1/0450/2142/9924/files/neuroblastoma_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/9401/6157/files/tubobepexapanafo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/9827963228.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/medical_report_form_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0435/5286/6455/files/javascript_convert_html_to.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_off000065a9.bin
7ec2a7d97d23cd39608a508b8489f7f156a84a4ec1eb89ba6ba0a7f9d601d207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A9 5816 bytes
font_01_sfnt_off000079b2.bin
e167c8ff6024531d8e53dc385989a8a93156710b47ce64eaa91d50c5116f327f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B2 11920 bytes

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