Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d5628e85c45a37…

MALICIOUS

PDF

46.3 KB Created: 2020-08-08 04:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8570f8a56f49ecb17111107a0116a1c7 SHA-1: 6b9c1872a81fd1d685d3f7e00509338b539ce71a SHA-256: e8d5628e85c45a373b60f9527772a063fad84365c3cb6826760309a1b1be80ff
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a significant number pointing to external resources, suggesting a link farm or SEO poisoning tactic. One of the primary links, 'https://ttraff.ru/pify?keyword=all+bodyweight+exercises+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'all bodyweight exercises pdf', indicating a lure to attract users to click on the malicious links.

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=all+bodyweight+exercises+pdf
    • http://sivuraku.newriverseedcompany.com/uploads/1/3/2/7/132710712/zukupaxof-jeguzelet-tetusezonolef.pdf
    • http://files.futurebanktoday.net/uploads/1/3/2/7/132740281/2664038.pdf
    • http://files.retreat4yourfeet.com/uploads/1/3/0/7/130740504/pefom-furexumodezuwij-vokapisibonewi.pdf
    • http://tijusopok.strackband.org/uploads/1/3/1/6/131637814/pisojobax.pdf
    • http://nefonaxax.ladpp.org.uk/uploads/1/3/1/4/131437601/kukip_gubobukewewamub_geviwitiwurul.pdf
    • https://cdn.shop
    • https://cdn.shopify.com/s/files/1/0438/9906/0392/files/hssc_group_d_recruitment_2020_notification.pdf
    • https://cdn.shopify.com/s/files/1/0437/7837/5829/files/bedenofanepirasevo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/33876217201.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/pefosawuxuwiderogorasuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/4494/6588/files/kuxejarafoxepenunopejuzoz.pdf
    • https://cdn.shopify.com/s/files/1/0439/1544/4379/files/ielts_speaking_topic_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/54527959169.pdf
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/cutting_edge_upper_intermediate_third_edition_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3882/files/4271836935.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/15917044276.pdf
    • https://cdn.shopify.com/s/files/1/0434/4279/8757/files/18397770853.pdf
    • https://cdn.shopify.com/s/files/1/0437/7231/3751/files/zazoj.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_off00007681.bin
ac70b3edea89b41615fc5ea54c8c6108c6159a81fd8c526cff52b9bb1e0dd3cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7681 5596 bytes
font_01_sfnt_off000089af.bin
8a8d7acb8eed1d13cb2333326d258d206cb307febc1ad5f6d99a91532e304150
pdf-font-stream PDF embedded font (sfnt) at offset 0x89AF 10168 bytes