Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5fceb7591f159e…

MALICIOUS

PDF

41.6 KB Created: 2020-08-30 00:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fed39c783009f0d16a5864db180319d7 SHA-1: 7ac9892566234ddcafd48de45d82e6c8cc0a8eeb SHA-256: 3b5fceb7591f159e165e7d886bb24cd70b3b14b62092318da83d2108c85c164d
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though partially corrupted, contains the text 'Analytics for dummies' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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=analytics+for+dummies
    • https://static.usrfiles.com/ugd/ad2ade_47045c3abfda4bfc8deacdbc775cb447.pdf
    • https://static.usrfiles.com/ugd/ae059d_6b985967009d4c5d93e14ab3ff42b1c5.pdf
    • https://static.usrfiles.com/ugd/01e791_ceca2d7bed004f259a6e324428ec0b84.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0adad6502bf40ae8d924276af56824c.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc77888b63c54c609c48469be275e08c.pdf
    • https://cdn.shopify.com/s/files/1/0432/4737/0402/files/thesaurus_synonyms_and_antonyms_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/pikimemovarixape.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0183fa233b04eaba1a5c57c03c6be3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0575b038a9734f3d914b65e489cd4a48.pdf
    • https://static.usrfiles.com/ugd/0d2908_635968c9b6f741c28e15d3d2f554da36.pdf
    • https://static.usrfiles.com/ugd/b8c837_574a705aa07d4f799105fe34f2ab17ff.pdf
    • https://static.usrfiles.com/ugd/2813e2_d5c1849d8d3845b0b6e31394cfaaf924.pdf
    • https://static.usrfiles.com/ugd/ab059d_1fdf53864c394ae9a92692b165d537f9.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_off0000650c.bin
78fdfbae8ce1c32f2cdd092fd8c9e589260441dd1041f33b8801ab6b2bf657a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650C 5256 bytes
font_01_sfnt_off000076d5.bin
0dea23e7ce89e05bc8a590f84afbdae204e88b433503986fe9a5bb67910790fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D5 10212 bytes

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