Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf67837d631771d3…

MALICIOUS

PDF

56.2 KB Created: 2020-08-06 22:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55d8fcc6fbdb36ddc708e4aa327de489 SHA-1: 15d74bc0965cafbbd004c5386db7a5bc5796e6ac SHA-256: bf67837d631771d36a0309f7d59e44d446496b1fdf5eaa3b27380f041f894851
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=report+writing+example+for+students+pdf'. This URL is presented within the document body, disguised as a benign resource. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL likely serves as a gateway to further malicious content.

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=report+writing+example+for+students+pdf
    • http://files.biblosglasgow.com/uploads/1/3/1/4/131438156/kunefaworuf-xefarupefawix.pdf
    • http://files.body-knowledge.com/uploads/1/3/2/6/132681824/2094315.pdf
    • http://files.windwardtoeden.com/uploads/1/3/0/7/130776131/geronebiziziranilu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/sizuronitovel.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/84203135674.pdf
    • https://cdn.shopify.com/s/files/1/0447/9143/1325/files/aisin_water_pump_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0439/0472/9243/files/mathematical_economics_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1515/9458/files/wolf_of_wall_street_script.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/wiwabanelukesexedi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3353/2315/files/2k14_cheats_codes.pdf
    • https://cdn.shopify.com/s/files/1/0428/3262/5831/files/fanidupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/katolimewofafazawupozokar.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7417/files/examples_of_synonyms_words.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/apprendre_le_portugais_rapidement.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/larewulufud.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/rwt_to_converter.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_off00009d87.bin
d91f68c2945f03ccf333c2d932887512669d0ce826550ba8be867b91f62d3966		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D87 5528 bytes
font_01_sfnt_off0000b05f.bin
09e4a219fb8cbff5d7afd3a3796c569f524046449274d744a2510bafa4ff2c11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB05F 10440 bytes

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