Malicious PDF — malware analysis report

Static analysis result for SHA-256 d225cdebefb29800…

MALICIOUS

PDF

54.7 KB Created: 2020-08-19 21:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 267962ce595c4da71c8184fdfae40e5d SHA-1: f795361bd2b16924d3217dc7925126cc4ef538fc SHA-256: d225cdebefb29800a73a9a96ca616c31f703bf083476cd66359de6ca5367cef7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=bhutto+song+remix+by+dj+shabbir'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on Shopify. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and several other Shopify-hosted PDF links, suggesting a lure to a malicious site.

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.ru/pify?keyword=bhutto+song+remix+by+dj+shabbir
    • http://files.giate.com/uploads/1/3/0/8/130813855/rifaz_menuwop_mupilavo_remaro.pdf
    • http://files.minipiginfo.com/uploads/1/3/1/4/131438046/3924572.pdf
    • https://cdn.shopify.com/s/files/1/0438/3653/9045/files/actionscript_3_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0430/9535/9637/files/85970396057.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/42703242295.pdf
    • https://cdn.shopify.com/s/files/1/0428/7932/0223/files/business_communication_today_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/15608875656.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/aol_build_eventbrite.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/concrete_forms_stakes.pdf
    • https://cdn.shopify.com/s/files/1/0429/2286/8892/files/development_economics_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/dajamaporedixukutu.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051e1.bin
acedc839b4d9e0716bdd525cb02e6b9c5dd6d9e8c8e580849d6460eb072ede0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E1 6384 bytes
font_01_sfnt_off00006197.bin
d65ddd4e3be3542558895747443bbec0dff4f59e9eb7ac89fd83710ac87830c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6197 5640 bytes
font_02_sfnt_off000074a4.bin
5baf6ea644f0d393d0bbd476c127a28715d71ca049001ebf971755e8f1401c9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A4 4956 bytes
font_03_sfnt_off0000872a.bin
2df63af6219c795c423852b84649c7d73180357bd0571f71eb276e9432ab39f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x872A 14760 bytes
font_04_sfnt_off0000b487.bin
ff24d85aa3fa11f297940fa65187c08f4c853d06fd26c6c5cd871b3b666e590a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB487 17120 bytes

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