Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d1ff30d954afca…

MALICIOUS

PDF

42.5 KB Created: 2020-08-29 09:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 956f752620882c852e7d45d30afdbf71 SHA-1: e41d613cf4b9379f14b3abe1e8b113c859afb409 SHA-256: f9d1ff30d954afca631616bb65d12e4760e530dfc796d7640ff761367c129f54
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 corrupted, contains text fragments that appear to be search engine optimized keywords for a study guide, suggesting a lure. The primary malicious IOC is the redirector URL, which is likely used to host further malicious content or phishing pages.

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/wix?keyword=mcsa+windows+server+2012+r2+complete+study+guide+pdf+free
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/report_anti_social_behaviour_birmingham.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0486/files/old_church_choir_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/3098/5376/files/64194523149.pdf
    • https://cdn.shopify.com/s/files/1/0428/3429/6988/files/muguwisogovasukezewuwo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0905/4619/files/moxoxamupulezizu.pdf
    • https://static.usrfiles.com/ugd/b8c837_d07acbe22936413fafc8bd56083d66e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_dfc587d6c35a4f17877ed0369fc95c21.pdf
    • https://static.usrfiles.com/ugd/b8c837_21a93deb7d684745b30393b29845fa17.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5a42b1e2bd64bd5809fbedd7ab6d539.pdf
    • https://static.usrfiles.com/ugd/b8c837_951e570927e8432a904e5e6ccbc294f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d928d30a28b4f8c87529791b03cfff4.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/35289657681.pdf
    • https://cdn.shopify.com/s/files/1/0434/1537/1932/files/82350235117.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_off0000650d.bin
7759860cba205067c05292c528d2426936d417caf1e07f3e1c987e64e8c3730d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650D 6060 bytes
font_01_sfnt_off000079ba.bin
3d43fb0adb23fe5eed4b1487cc4c85cf463a36a660f3e39ec41051063306dcc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79BA 10296 bytes

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