Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b72567771b79da…

MALICIOUS

PDF

48.4 KB Created: 2020-08-10 17:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3eebd84c2628f919abf485b0486b9c6 SHA-1: 1f86416b0222fb55833c50886cb08646b1905a09 SHA-256: 30b72567771b79da7ca90adbdff4dadb499386d1fcea74dc4f87f01dbcb4de02
128 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=gmat+verbal+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'gmat verbal pdf' and the tool 'wkhtmltopdf', suggesting a lure to trick users into downloading malicious content disguised as study material. The presence of a visual download button further supports this phishing pretext.

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=gmat+verbal+pdf
    • http://files.greatscottideas.com/uploads/1/3/1/3/131398097/da2b196a7d.pdf
    • http://files.earth-shine-llc.com/uploads/1/3/1/4/131409017/tavipobi.pdf
    • http://domefa.boldcupcoffee.com/uploads/1/3/0/8/130815017/5874f7c.pdf
    • http://files.houstons.net/uploads/1/3/1/4/131453919/novimetosanegak.pdf
    • http://dogag.committedtohim.com/uploads/1/3/1/6/131637136/4774872.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/23112318305.pdf
    • https://cdn.shopify.com/s/files/1/0440/8652/6102/files/92156309825.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/altium_designer_pcb_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/dajujaforikinikuzasuwuraw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1393/9110/files/invocation_of_my_demon_brother.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/jinufipabiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/gipulabivoxalexufo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/tusanexuzatik.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/9115355815.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sividejujim.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/vakosedugisuref.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/25182107747.pdf
    • https://cdn.shopify.com/s/files/1/0431/4955/7917/files/bayesian_inference_tutorial.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_off00007f4b.bin
d6219723490d8a87ff393c5e5540242d9343bc7134ec1d4e511c0712d483aa69
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4B 5240 bytes
font_01_sfnt_off00009110.bin
67bef6b98b0a9f35ae28045d54e2aa11574d024bf03e337a205de1a77370651a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9110 10632 bytes