Malicious PDF — malware analysis report

Static analysis result for SHA-256 f978fe161ec9232b…

MALICIOUS

PDF

41.2 KB Created: 2020-08-24 22:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 019f1df5f4054e7b22d9629200fdc21f SHA-1: 5130074d0c480316335a0986cfe736a303eaa928 SHA-256: f978fe161ec9232b294c3838702ab4bf91d7eeb7c235035e4baf084172c7ad81
150 Risk Score

Malware Insights

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

The PDF contains a prominent link to a known malicious redirector, ttraff.ru, disguised as a 'csbg annual report instruction manual'. This indicates a social engineering attempt to direct users to malicious content. The PDF also features a large number of external links, many pointing to Shopify domains, suggesting a link farm or redirection strategy. No scripts were extracted, but the primary malicious activity appears to be the redirection to the ttraff.ru URL.

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=csbg+annual+report+instruction+manual
    • http://sasam.snugharbormarina.com/uploads/1/3/2/6/132680863/abb911389c.pdf
    • http://files.nelsonmandelachildrensfund.com/uploads/1/3/1/6/131606953/tovujisatuni.pdf
    • http://files.wardragons.info/uploads/1/3/0/7/130739564/zokafafaga.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8402/files/41691792575.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/semiologie_appareil_urinaire.pdf
    • https://cdn.shopify.com/s/files/1/0448/7489/1431/files/medical_internet_of_things_and_big_data_in_healthcare.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/pemudanusoxolelokiwepume.pdf
    • https://cdn.shopify.com/s/files/1/0437/6585/8455/files/two_dimensional_shapes_kindergarten_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/9948/8423/files/33193841330.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11085861466.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/28745789213.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/koganogek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulexukiwogefera.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1218/files/soliman_s_auricular_therapy_textbook.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_off000061f1.bin
d01c948133b5425ac20acafeba88a93869a5b0f409514f35ddd4bc4f8c40676a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F1 5300 bytes
font_01_sfnt_off000073db.bin
8efb24a153dbd06b3fc5a2032b8644b8c7a4efd0e93b239bf2cf970c2051fad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DB 10548 bytes

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