Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15d3cb685c0e644…

MALICIOUS

PDF

54.9 KB Created: 2020-08-12 12:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a0e2b719b154c27c597558ab747898c SHA-1: 58deec896c0b2f45db38da713abeb7f576aa45f9 SHA-256: f15d3cb685c0e644c5a4f61d3b1c82120f930f1c4d59101ce2ad57abb729a624
120 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, pointing to 'https://ttraff.com/pify?keyword=oxford+physical+science+grade+11+textbook+pdf'. This URL is embedded within the document body, which is disguised as an academic textbook. The presence of a link farm heuristic further suggests a malicious intent to drive traffic through potentially harmful URLs. 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/pify?keyword=oxford+physical+science+grade+11+textbook+pdf
    • http://files.fairytaleparties.ca/uploads/1/3/1/4/131483955/4c400.pdf
    • http://files.kinderkiddles.com/uploads/1/3/1/4/131452867/c6ceb669a.pdf
    • http://gugipet.saratoganykennelclub.com/uploads/1/3/0/8/130814088/4246291.pdf
    • https://cdn.shopify.com/s/files/1/0437/2260/4695/files/bhagavad_gita_in_kannada_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/46427990642.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/inverse_of_a_log_function.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/migize.pdf
    • https://cdn.shopify.com/s/files/1/0438/9906/0376/files/99120317336.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/jisovejibejetem.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/dinikatitabepe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/kotijipudamoxine.pdf
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/la_noire_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3362/files/besm_d20_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/32076137193.pdf
    • https://cdn.shopify.com/s/files/1/0435/9058/2435/files/55596067718.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_off00008fad.bin
ab68b9312fef71463bc9da244f8670d7284bedde2ab488f0b3b72b0c9a4253dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAD 5868 bytes
font_01_sfnt_off0000a3b9.bin
84b435e8c06cfe4c13bd0d9e3fc79ebf40734f65fa973a3459f257664ac014ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B9 13192 bytes

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