Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff9e036b730ecce…

MALICIOUS

PDF

45.2 KB Created: 2020-08-22 07:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a24c16cd67d22431af7222c3372122d SHA-1: 3c57cbc1a80ad68aaeadc7c4c450943af3cb84ee SHA-256: 7ff9e036b730ecce31403a3cec9dc987bed4a59962ceeb85b6e40f34a78f27ac
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector, 'ttraff.ru', which is likely used to funnel victims to phishing or malware sites. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify-hosted PDFs, suggesting a broad distribution effort. The presence of these link farms and the malicious redirector points to a phishing or content-luring attack pattern.

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=berliner+platz+1+neu+audio
    • http://powaz.jnrhomeimprovements.com/uploads/1/3/0/7/130739048/70703fa7423261.pdf
    • http://files.brandtechnology.com/uploads/1/3/1/4/131408203/4740797.pdf
    • http://gajodixox.utopianlandscapes.net/uploads/1/3/1/0/131069899/pefiwuduxemab_vamavigavurus_koxozanudax_kuxonigu.pdf
    • http://files.mysunfast3200.com/uploads/1/3/1/4/131453934/vabedulofuruxo-bikasufuvufule-visub.pdf
    • https://cdn.shopify.com/s/files/1/0443/8884/3686/files/data_analytics_basics.pdf
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/3d_exporter_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/does_steam_games_while_you_play.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2636/files/rebemedibutulemulekixob.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/how_to_make_room_heater_at_home.pdf
    • https://cdn.shopify.com/s/files/1/0437/7490/2423/files/calculus_early_transcendentals_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/6412/9696/files/35748702965.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/75971666265.pdf
    • https://cdn.shopify.com/s/files/1/0440/5441/3462/files/gametogenesis_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/98567203254.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/sijudabinasulateg.pdf
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/ciara_body_party_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/xugafuxokivafokan.pdf
    • https://cdn.shopify.com/s/files/1/0428/4402/9084/files/visiguva.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_off00006ec2.bin
1b49974c7559f850d5492cb973efb4b779c8db6d113faf4115b4246a6b5401a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC2 4924 bytes
font_01_sfnt_off00007f94.bin
65c64f4d595708c469175561459d240f5533665d60340660804947c336eeee84
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F94 12312 bytes