Malicious PDF — malware analysis report

Static analysis result for SHA-256 8256fa2ae077a1dc…

MALICIOUS

PDF

38.6 KB Created: 2020-08-29 09:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70934aed2fbe68288e49f8e491af34e5 SHA-1: cd6306d5e98688dc1f2e2b009094579fb310d8bb SHA-256: 8256fa2ae077a1dc012fac08454ad51160387b8187d4707e7196a7234407be30
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for users seeking content. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation to increase visibility of the malicious link. No scripts were extracted from this sample.

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=anthony+robbins+books+pdf+download
    • https://static.usrfiles.com/ugd/b8c837_f2de29d2d2bc466c9e636446c77df15b.pdf
    • https://static.usrfiles.com/ugd/b8c837_66ec3798ae87428899dc1dce723c1f64.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e7a0ac6459b4b5997ba2ee2ef7a0f97.pdf
    • https://cdn.shopify.com/s/files/1/0433/2801/2456/files/casio_991_calculator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/kudobadidotetitiwojo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81236671698.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/jutemimomafivuzavi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/how_to_make_crack.pdf
    • https://cdn.shopify.com/s/files/1/0437/6317/1485/files/28209357651.pdf
    • https://cdn.shopify.com/s/files/1/0440/7800/6437/files/53._544_113._490.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/77620296151.pdf
    • https://cdn.shopify.com/s/files/1/0433/3318/9800/files/formato_de_certificado_medico_escolar_sep_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4481/files/atresia_biliar.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/project_proposal_cover_letter_sample_doc.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_off00005705.bin
9922ab595d0bee27d061d5e52447304a1c51f6f3b7a1ed8a848d4f3739d44a0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5705 5516 bytes
font_01_sfnt_off000069c9.bin
077b36b0b9a1d9224ca69c8049bc686db2a541389d6e73095454b7c8f0f6a65b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C9 10860 bytes

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