Malicious PDF — malware analysis report

Static analysis result for SHA-256 009f6a8d61e08426…

MALICIOUS

PDF

48.0 KB Created: 2020-08-11 21:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e866791c8fd6cc224548da8afa49670 SHA-1: ecc112025a2e5d8f290174c51384dde107c51717 SHA-256: 009f6a8d61e08426663ccc37814eb5e143ede0ff4e055c6c61a566557a62ea07
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, with one critical link pointing to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=gladys+aylward+book+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=gladys+aylward+book+pdf
    • http://files.ywcaminot.org/uploads/1/3/1/3/131384400/wifajivifofopa_vigokerogu.pdf
    • http://fipabog.stelmosfire.org/uploads/1/3/1/3/131398360/kedakel.pdf
    • http://files.carstens-chihuahuas.com/uploads/1/3/0/8/130874205/565a0e.pdf
    • http://files.hagahthisbook.com/uploads/1/3/2/6/132681824/pibixobaxenaz-semojaneguwin-kazelade.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/meditations_marcus_aurelius_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5488/3231/files/rusubujifamafepomusovima.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70277109097.pdf
    • https://cdn.shopify.com/s/files/1/0444/1725/3542/files/descargar_revista_casa_viva.pdf
    • https://cdn.shopify.com/s/files/1/0439/1315/0632/files/land_rover_parts_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0437/8954/9729/files/antibiotic_resistance_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/natoziwewot.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4946/files/public_holidays_qld_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/ableton_live_9_power.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/4958176734.pdf
    • https://cdn.shopify.com/s/files/1/0432/1515/9458/files/84477900072.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1123/files/divujo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/caisson_metod_ikea.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a44.bin
ef6b94d3ad92c7ead17211dd206c97c812875dcec17fe7a64cd2d41b6b63bb41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A44 5504 bytes
font_01_sfnt_off00007d46.bin
f30cad29e9abeb2695b51b569e5e1b4c98389da4852eefb56035928c0b7d8c65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D46 5464 bytes
font_02_sfnt_off00009009.bin
3c99eecd1eca10b5a3435cbf63e604b9b096cfd9422d308958d0c36ff59519e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9009 10192 bytes

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