Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd52cda35d01f89c…

MALICIOUS

PDF

42.0 KB Created: 2020-08-24 17:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41e11f9e22d9fe1e8b80a205d8e3da1a SHA-1: 2bad1f5ca3a24c0d22fe91d96e3ab725b51075f3 SHA-256: bd52cda35d01f89c5615a978a84fca612d6877eb171dff21d240d61234b6b7d9
128 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to potentially malicious redirectors. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body also contains this URL, suggesting it's the primary lure. The presence of a download button heuristic further supports the idea that the document is designed to trick the user into clicking a link. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=jio+phone+music+call
    • http://kegulod.jrouamnationalcouncil.org/uploads/1/3/2/8/132814718/gobaj_getawubup_jubipinapef.pdf
    • http://files.christopherweedman.net/uploads/1/3/0/7/130775347/fixejefejafeg.pdf
    • http://dupuvab.bethchrismanmusic.com/uploads/1/3/1/1/131164250/gakugewuwowajig.pdf
    • http://files.catj.org.uk/uploads/1/3/0/7/130740073/3469232.pdf
    • http://pivuxaw.damianduguid.com/uploads/1/3/1/3/131398140/3102564.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/bankers_adda_static_gk_capsule.pdf
    • https://cdn.shopify.com/s/files/1/0430/6642/5497/files/75680704099.pdf
    • https://cdn.shopify.com/s/files/1/0435/3143/6186/files/lesikozanemem.pdf
    • https://cdn.shopify.com/s/files/1/0438/1959/7981/files/gate_2020_question_paper_with_solution_ece.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/ketovufimedosizisidim.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/85256743393.pdf
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/vonedabirixakatugajoge.pdf
    • https://cdn.shopify.com/s/files/1/0434/0475/5096/files/birapitapixesifosulanafe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/67887508673.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1162/files/98403816949.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/fotefidi.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/company_logo_quiz_answers_level_9.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_off000066ba.bin
cb63d2b5f403d83c5adbf9f901eb68a0640d0efb34680570e2924ae571c1d422
pdf-font-stream PDF embedded font (sfnt) at offset 0x66BA 5064 bytes
font_01_sfnt_off000077c7.bin
04f837373e1c1a5578c5a85585f1b5df479588bf9a8b53ca95c7555a6c6688cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C7 10312 bytes