Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf962d2e8b2f491…

MALICIOUS

PDF

42.7 KB Created: 2020-08-07 14:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a6b3e7e0c0732250a20ea656dea170f SHA-1: 59064c19b6b6b573e36e6dcf64e2784e0e09b590 SHA-256: 8bf962d2e8b2f49104c1d49eb2e80698ce39de1adca817fbdc93fe2458d70513
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'ttraff.ru'. The document body, though corrupted, contains text related to 'Vernier caliper practical pdf', suggesting a lure to disguise malicious links as legitimate content. The presence of numerous links, many hosted on Shopify, indicates a link farm designed to distribute traffic to malicious sites.

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=vernier+calliper+practical+pdf
    • http://files.chsvideo.com/uploads/1/3/1/4/131437410/wavelidekimanutexu.pdf
    • http://musawe.kathaleenkateoliverson.com/uploads/1/3/1/4/131452883/6217003.pdf
    • http://jirupu.sgttommyskids.org/uploads/1/3/1/4/131454012/getudumunobumu-xojerotiganenu-jejiwam-doxujefozi.pdf
    • http://files.feelartmaster.com/uploads/1/3/2/7/132711961/bd326634a0b5.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/17901931667.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/sudo_spctl-_master-_enable.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6568/files/mufuvesirigif.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/kekofikuvob.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/makkar_ielts_speaking_download_may_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/32474024842.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/15369473923.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/fosizawit.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/ganonisibowos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/world_religion_and_belief_system.pdf
    • https://cdn.shopify.com/s/files/1/0430/5446/5175/files/xemeketekuvupe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/widaxixon.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/wojesilapidan.pdf
    • https://cdn.shopify.com/s/files/1/0436/4166/7734/files/what_is_convenience_sampling.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/translating_words_into_algebraic_expressions_worksheet.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_off00006988.bin
743a8ccf529ea695e6b7f077b561d4d61dbfd5e5a83865fcd7d9c3e60ee416ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6988 4936 bytes
font_01_sfnt_off00007a6a.bin
d7216af1571a07c3c512e48c4fe3142df3cf10a0841b9289df6df18dda176b73
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6A 10356 bytes