Malicious PDF — malware analysis report

Static analysis result for SHA-256 352c1d89dbcee8c4…

MALICIOUS

PDF

36.0 KB Created: 2020-08-28 04:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72a4addeae7ac4e546028465aebc84e9 SHA-1: 61aee4219304da4850fba8ae491e8b2f00f71c6c SHA-256: 352c1d89dbcee8c4ce1fb646ba842b1b42154c0cd15c6b0d989eea01e03cf0ff
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic firings indicate a PDF link farm, suggesting the document's primary purpose is to distribute malicious links. No scripts were extracted from this sample, but the extensive link farm points towards a phishing or malware distribution campaign.

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=intro+to+sociology+seagull+10th+edit
    • http://mesatot.oregonwethepeople.org/uploads/1/3/1/0/131070786/f24356c93a0.pdf
    • http://files.heathergreig.com/uploads/1/3/2/7/132740249/9002952.pdf
    • http://gikososu.airbrushinggourds.com/uploads/1/3/1/4/131437914/wexalitafaberosim.pdf
    • http://gamuvon.luckydogrescuechicagoland.com/uploads/1/3/1/8/131872155/243370.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/alchemist_book_in_urdu_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/riwavewibuviladawedifijux.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0714/files/36678014344.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/57359755511.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/foruzuwefu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3818/6394/files/75269569094.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/nature_domain_5e.pdf
    • https://cdn.shopify.com/s/files/1/0432/8062/9913/files/sense8_christmas_special_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/board_meeting_agenda_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/sklearn_logistic_regression.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/les_revenants_season_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/tekovon.pdf
    • https://cdn.shopify.com/s/files/1/0431/8216/2084/files/45649421435.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_off00004ef2.bin
8a15afaca8e534632ecc17db85b4395210f7e3a5b35e9465c69ebf205b4c1caf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF2 5432 bytes
font_01_sfnt_off00006163.bin
b9acaf7641a8a4729ac99d1d91fa2d398c58dce17d73bd8383b536b6dd7df61b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6163 9852 bytes

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