Malicious PDF — malware analysis report

Static analysis result for SHA-256 408fbdb882c1ab53…

MALICIOUS

PDF

42.4 KB Created: 2020-09-05 13:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0058b8aa8b356cf116e64db0a9791217 SHA-1: 2694fccc4a8d0abff08132406b5478cf7a1a899a SHA-256: 408fbdb882c1ab53dd9d0905e95797aa7f3ef23ab869fe307129204c490d7cc7
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. This URL is embedded within the document body, which also contains a large number of other PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to the 'ttraff.com' redirector, which likely serves as a gateway to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=2018+calendar+pdf+september
    • https://cdn.shopify.com/s/files/1/0441/2358/6712/files/revutirawegurobofigijux.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/59771668108.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/magiworesatepurejedafon.pdf
    • https://cdn.shopify.com/s/files/1/0431/6427/0743/files/badatulevajiroderulal.pdf
    • https://static.usrfiles.com/ugd/eed56f_896a3e9991644592a400b10db93c92dc.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/10757174531.pdf
    • https://cdn.shopify.com/s/files/1/0437/7447/6440/files/11921336035.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0434/8080/9625/files/15912696290.pdf
    • https://static.usrfiles.com/ugd/c7a620_7c3f295e9a4c4c0fa4472ee6faf34a13.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbaaeef765e44aec8c019e6d1b63adac.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6ca7f822b834568a74c277fe4f93ac5.pdf
    • https://static.usrfiles.com/ugd/544e7e_80009d1d7b534e9987c3961a20248c1e.pdf
    • https://static.usrfiles.com/ugd/ce77c6_1da993eba285449e82740331f47d9a9c.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_off0000659f.bin
ce30d4722e3f006885e12d00d83ff108012c0fbff435c2bae138666385b3d1a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659F 5864 bytes
font_01_sfnt_off00007979.bin
bc5d2e2eee1c81641d7db1826a2a27668b501eb04e77a63b3e9f79c3435fc8ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7979 10548 bytes

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