Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bef35680727c86…

MALICIOUS

PDF

44.6 KB Created: 2020-08-09 17:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abd2f61f6d90d402e491835ac665f328 SHA-1: 705f33caa59f9e2c4276a7fa6d6111f9a62a6ca8 SHA-256: a6bef35680727c86d16670fb989b96c78f5416ea41cde73ff19817927f630202
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector URL (ttraff.ru) that is flagged as malicious. The document body also contains the malicious URL, suggesting an attempt to disguise it as a legitimate search result for a technical document. The presence of numerous Shopify links, while some are benign, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=applied+regression+analysis+wiley+series+in+probability+and+statistics+pdf
    • http://files.earthartbalance.com/uploads/1/3/0/7/130775918/3283731.pdf
    • http://files.asmuyaocommunityschool.com/uploads/1/3/2/7/132740743/324409.pdf
    • http://files.martinlodge624.org/uploads/1/3/2/6/132695525/dijafukesemotapuvon.pdf
    • http://files.bloomingtoncenterformindfulness.com/uploads/1/3/1/0/131069934/paror_sapiser_xodenojipaf.pdf
    • http://files.thedinopark.com/uploads/1/3/2/7/132740415/6535022.pdf
    • https://cdn.shopify.com/s/files/1/0437/4695/1319/files/computer_lab_technician_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1297022614.pdf
    • https://cdn.shopify.com/s/files/1/0429/7218/4732/files/50691758011.pdf
    • https://cdn.shopify.com/s/files/1/0432/6123/1262/files/zanipomotetedoraz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/benapufosugaravoderodur.pdf
    • https://cdn.shopify.com/s/files/1/0430/4823/9257/files/30405605655.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/bheemili_kabaddi_jattu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89965927340.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/tmux_resize_pane.pdf
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/blagues_carambar.pdf
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/telecharger_les_journaux_algeriens_d_aujourd_hui_en.pdf
    • https://cdn.shopify.com/s/files/1/0429/7739/4847/files/vubadenowinajenosij.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/college_diploma_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.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_off00006d70.bin
b412e6f9facbbfad85801c9dcbcbcfb38964144f3c2848a19d199964c9b42ac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D70 5648 bytes
font_01_sfnt_off000080c9.bin
85bb3ab47f0023d1f57f56f0e1eaaf647237914bde8080d99e189fadbf4aef98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C9 10276 bytes

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