Malicious PDF — malware analysis report

Static analysis result for SHA-256 858a09ebc8849409…

MALICIOUS

PDF

50.7 KB Created: 2020-08-18 14:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8551aa61bf416e039215924fd66dfb1b SHA-1: 44cfa7a761c699d7e509f276032e9e196fce5f6c SHA-256: 858a09ebc8849409490ccd30c3f73bbe766c27707330e61e48fe90a5bffec8be
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains this malicious URL. The heuristic firings indicate the PDF is designed as a link farm, likely to distribute malware or phish users. The primary attack pattern involves redirecting users to malicious infrastructure.

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=pneumonia+bacteriana+formas+de+tratamento
    • http://files.grandmau.com/uploads/1/3/1/4/131437799/taludumusufif-sogewoje-lalawuke-jugozewade.pdf
    • http://files.buildingyoureternity.org/uploads/1/3/1/3/131382630/4dbf21742eaae.pdf
    • http://soxikog.setoncrusaderscyo.org/uploads/1/3/1/3/131381497/wuvifon_rusoxi_xiwuv.pdf
    • http://donoroli.jscsbc.com/uploads/1/3/0/7/130738731/c6e4bd897a.pdf
    • http://files.undeniabull.net/uploads/1/3/1/6/131637055/rezogexed-pelopusitu-baxug-vejenugedozaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1997/files/zaxovigunaju.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/platform_movie_ajay_devgan_ki_full.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/livaxeboxelezuluwozi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/lalitha_sahasranamam_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/brexit_nedir.pdf
    • https://cdn.shopify.com/s/files/1/0436/6086/9785/files/academic_writing_and_composition_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/9190/1081/files/wipunetutajokaxivema.pdf
    • https://cdn.shopify.com/s/files/1/0431/0410/8711/files/kupiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/binomische_formeln_textaufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/vewufod.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3335/files/17359824940.pdf
    • https://cdn.shopify.com/s/files/1/0433/7899/9446/files/74893453740.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007649.bin
4e75ade670b2169dc79de0dd021fccc90225278c3ab1fa051b263fcb639c09e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7649 6416 bytes
font_01_sfnt_off00008614.bin
d26fb33d09f12fa5990f59cf75481031d594cb91f3a37a14a5f3d2b681d134d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8614 5276 bytes
font_02_sfnt_off000097e7.bin
9641db2a2a0b616332e34b290130a19b276d0e9bbf28869178fb96d0b0c42af1
pdf-font-stream PDF embedded font (sfnt) at offset 0x97E7 11420 bytes