Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3dff675f6465347…

MALICIOUS

PDF

34.6 KB Created: 2020-08-23 10:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cf7789322f6408499a09a42a7f9d14a SHA-1: 77deae9e94c4c9f8d7ed90f23a5ac1e085877dc9 SHA-256: b3dff675f6465347b7277d35454897b696786a22dfc69cd72ca44034efa97000
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=emulator+androida+na+pc+chomikuj'. The document body, though heavily obfuscated, also contains this URL, suggesting it's a lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to increase visibility of the malicious redirector. No scripts were extracted, limiting further analysis of the payload.

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=emulator+androida+na+pc+chomikuj
    • http://files.happyvalleycalisthenicsclub.com/uploads/1/3/1/6/131636956/f6558.pdf
    • http://files.jojosorganicskincare.com/uploads/1/3/1/6/131606719/60514c2b47a.pdf
    • http://vasapa.vitalnutritioncapecod.com/uploads/1/3/1/4/131406717/kesobenul-gifadijem.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/61598613372.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/polymerase_chain_reaction_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/tetijutidavade.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/59609206004.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1336/files/57561253246.pdf
    • https://cdn.shopify.com/s/files/1/0440/0916/0862/files/97690421480.pdf
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/phonics_board_game.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/25784317405.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/go_sms_emoji_keyboard.pdf
    • https://cdn.shopify.com/s/files/1/0436/5585/6281/files/alcohol_120_for_windows_10_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/audioslave_like_a_stone_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0572/files/49309113315.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/inochi_no_namae_sheet.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_off00004dd2.bin
7e223e165f51e0337df95adf92049af37043d903322ade48779047153bd46829
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD2 5232 bytes
font_01_sfnt_off00005f6d.bin
9ad8f2e7ca7eb5df703c613388b12add8da77448c421c3d631111d7ae7853e4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6D 8892 bytes