Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69b451bd30573ca…

MALICIOUS

PDF

42.5 KB Created: 2020-08-24 00:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99eb48f4988fc51151ff3e1c4ba98882 SHA-1: a6d5f5ac812e0adaa12a7f89472dffae7b2daf96 SHA-256: a69b451bd30573ca58e20fdf66a97dd56ae2aa1782e498ce131f6d20b2e3f666
150 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm. The primary malicious URL, https://ttraff.ru/pify?keyword=viber+old+version+for+ipad, is presented as a download link for 'Viber old version for ipad' within the document body. This URL is flagged as a malicious redirector. The document also contains numerous links to PDFs hosted on Shopify, likely as part of an SEO spam campaign to improve the ranking of the malicious redirector.

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=viber+old+version+for+ipad
    • http://files.twinappliancesinc.com/uploads/1/3/1/3/131379761/bobaduzipekom_zupuvi_minuribomodofi_rinudad.pdf
    • http://files.historicalartandconsulting.com/uploads/1/3/2/7/132740234/modoxodakeni.pdf
    • http://files.invictund.com/uploads/1/3/1/8/131871466/5708486.pdf
    • http://vaxovirep.surrenderedtochrist.org/uploads/1/3/1/4/131406149/7385904.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/2911398325.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2891/files/possessive_form_of_family.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/boise_tv_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/the_batman_who_laughs_issue_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/espn_fantasy_football_cheat_sheet_by_position.pdf
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/bizinalapezitofanokiwatog.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/muzifuginurox.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/ndlea_referee_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/9209/8724/files/28317452403.pdf
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/xitunidajesuzijazebun.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_off0000683e.bin
bd98969d171427fbad5e7eb622fa4fdc8a050726963045e8481466293c2a276c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683E 5200 bytes
font_01_sfnt_off000079f8.bin
93372704a2dddaf417e84b4fed3ecdf77c3d35b604eddeefc7cffcf790709021		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F8 10604 bytes

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