Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1dccd88fc38441b…

MALICIOUS

PDF

42.3 KB Created: 2020-09-01 00:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b037263215adcd8293fc8f8c7f1308c SHA-1: 8f548d64dcc14063c783a280417a22aaa3dcfe7b SHA-256: d1dccd88fc38441b2082f71e3836b3d8a208eccc3f1c333d1faf262ac6cd54bb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=auditing+and+assurance+standards+board+annual+report'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0437/9531/6896/files/learn_amharic_alphabet.pdf'. The document body also contains text suggesting a lure for remote support tools, which is high-risk in unsolicited documents. These factors indicate a malicious intent to redirect users to potentially harmful content.

Heuristics 4

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=auditing+and+assurance+standards+board+annual+report
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/learn_amharic_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/76524988247.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/numofamako.pdf
    • https://cdn.shopify.com/s/files/1/0438/9080/2856/files/4th_grade_math_workbook_with_answers.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_d0feed72ff34447eb6d111fd5b3b0bdf.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_05bcc653139a4e7eaf2fdae9dcf635f5.pdf
    • https://static.usrfiles.com/ugd/12dc78_9f201edad7024d66a0b7410571fd3508.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0accbc53ea149d38056e2367b498ef8.pdf
    • https://cdn.shopify.com/s/files/1/0464/1672/4136/files/wemuledubegeso.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/biophilic_design_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/57147234484.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7294/files/blowback_christopher_simpson_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/46443832120.pdf
    • https://cdn.shopify.com/s/files/1/0434/7160/1817/files/sure-_fire_forex_hedging_strategy_ea.pdf
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/61849559499.pdf
    • https://cdn.shopify.com/s/files/1/0430/8752/8103/files/48328767551.pdf
    • https://cdn.shopify.com/s/files/1/0434/2336/7335/files/samknows_whitebox_hack.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/xizotiwojivitonesiwijexi.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_off00005a17.bin
7a4b42991c83d020a9f60f5adab58dacbfa05e0cdfb6bc0e4688f065a041dfcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A17 5252 bytes
font_01_sfnt_off00006be7.bin
0782b607b0affc1ea3a44a62af36699d5e7b2ada29f6a1f4f2bcd8da75833f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 9844 bytes
font_02_sfnt_off00008d9c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9C 4324 bytes

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