Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f2039d1464d5e2…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 18:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b0b2e416a2a093b4db742d90c34058a SHA-1: 53ba8cf448ef627d30171ddf534cef4929f8f6c1 SHA-256: 57f2039d1464d5e24013dd63929c3a125889d46c01c87ebd8c82b356fdd3aabf
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One of the embedded URLs, 'https://ttraff.com/wix?keyword=convert+between+metric+units+workshe', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. No scripts were extracted, and the primary attack vector appears to be social engineering via malicious links.

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=convert+between+metric+units+workshe
    • https://static.usrfiles.com/ugd/b8c837_7f3cd09ffc994c1f9ca8a27c62383c76.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9097c534ec648f8ae044f403ba0f86e.pdf
    • https://static.usrfiles.com/ugd/b8c837_257ff7cb4bf341fd9cb2c9f079d40954.pdf
    • https://static.usrfiles.com/ugd/b8c837_a409acdc255f47debc86f2cbc47a36cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_edb856a9c6ec4f37b96d4757c6fd5147.pdf
    • https://static.usrfiles.com/ugd/b8c837_71d1900793254200ac350b4dec416136.pdf
    • https://static.usrfiles.com/ugd/738632_6687e652cd094a60ae89200816ee682f.pdf
    • https://static.usrfiles.com/ugd/03ae60_a95dc61a3f7944e2957c07a612e317a5.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/33550220067.pdf
    • https://cdn.shopify.com/s/files/1/0439/8913/9614/files/rizomigijibatotupesegefov.pdf
    • https://cdn.shopify.com/s/files/1/0436/8452/8281/files/fitness_membership_agreement_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/dusovukiwipisid.pdf
    • https://cdn.shopify.com/s/files/1/0437/3587/5749/files/active_listening_101.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_off00005f7a.bin
5055911d08a5d9b0027304abdaeea223161042a302611cf672096807fcbc3bb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7A 5060 bytes
font_01_sfnt_off000070a1.bin
78dd0048f98555a34ce11d3e1be063e4d0889da84c3ca47c58974ea8745607bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A1 13488 bytes

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