Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f9f0a2152ec8be…

MALICIOUS

PDF

43.4 KB Created: 2020-08-26 20:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62d408218dfd0af1d5d076dd0ad9e44d SHA-1: 27c12cf71d6b04b7afb372498622bf11895043c8 SHA-256: 31f9f0a2152ec8be56a5a5a7c62d3930592ce9e7a7e2ab018953d56946d706d9
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=tenses+table+in+english+pdf'. This URL is presented within the document body, disguised as a PDF resource. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on various subdomains of .com domains. The primary malicious URL is the most critical IOC.

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=tenses+table+in+english+pdf
    • http://files.joyforthejourney.org/uploads/1/3/0/7/130776499/gaxuf_nezopa_jewawizoge.pdf
    • http://pawuwez.cantonohiolandscaping.com/uploads/1/3/0/7/130776321/3998718.pdf
    • http://files.epmachineshop.com/uploads/1/3/1/6/131637163/3613837.pdf
    • http://files.pressurewashingtylertx.com/uploads/1/3/1/8/131871583/603116bde14.pdf
    • http://files.taraflyart.com/uploads/1/3/2/6/132695372/pelasur.pdf
    • https://cdn.shopify.com/s/files/1/0436/5081/0014/files/75154733156.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6658/files/gender_essentialism.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/nipanilamegumudotu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/72643280517.pdf
    • https://cdn.shopify.com/s/files/1/0436/4389/5966/files/1139554437.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/lojogukav.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/adr_dangerous_goods_note_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/55715294435.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/26052980694.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/autism_behavior_checklist_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0434/0446/0188/files/ableton_live_crackeado_2019.pdf
    • https://cdn.shopify.com/s/files/1/0436/1568/2717/files/what_does_lmao_stand_for.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_off00006bc6.bin
67dd68ff196ad4e5002596682d6ae21c8ba7e099895158da2528d136c70c7180		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC6 5296 bytes
font_01_sfnt_off00007dbb.bin
972c53f4f4be98ebd01684881c7f3115482b87c7430c622ef0c0096670363083		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBB 10068 bytes

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