Malicious PDF — malware analysis report

Static analysis result for SHA-256 799a30f069ba60de…

MALICIOUS

PDF

52.2 KB Created: 2020-08-13 21:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd622864dee7fa35db7313e852126a7d SHA-1: 738d452e6190d52133afeca2c7b14fca91ced767 SHA-256: 799a30f069ba60de40cf9ff926e438b2ded19166893362490aaf4357aab3541d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a link farm hosted on Shopify, designed to appear as legitimate documents. One critical finding indicates a direct link to a malicious redirector at 'ttraff.ru', which is likely used to funnel victims to further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=android+studio+tutorial+for+beginners+in+tamil
    • http://files.iillestfinds.com/uploads/1/3/2/6/132695219/lozala.pdf
    • http://files.emmabankshomeopath.com/uploads/1/3/1/8/131856046/xorab.pdf
    • http://files.diamond-equine.com/uploads/1/3/0/7/130739718/xovipeluled_xanugolu.pdf
    • http://files.kaurpsychiatric.com/uploads/1/3/1/0/131070469/6401494.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1415/0553/files/bibla_ne_shqip.pdf
    • https://cdn.shopify.com/s/files/1/0438/2749/5072/files/allahabad_university_holiday_list_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0428/6831/0172/files/gomizazikisiduzimogave.pdf
    • https://cdn.shopify.com/s/files/1/0435/3628/5860/files/xofezosalagemikuvix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viloronijiletamuzolodoxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/6345632940.pdf
    • https://cdn.shopify.com/s/files/1/0433/3607/3366/files/94794956895.pdf
    • https://cdn.shopify.com/s/files/1/0438/5321/7952/files/daily_phonics_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/9490/7810/files/jasiledirudefelenuni.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/11544243649.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/wow_tailoring_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/74734125948.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a67.bin
7b9b95f7f349d3406b57f7944304613bb9f5d2bf77ee998e5f5d429d94a14d1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A67 5356 bytes
font_01_sfnt_off00009c81.bin
32134308675f4db9ca9cfbe61ae55b471ba14045f22ab9c62848ed9e78791dfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C81 10780 bytes

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