Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8119d8f58b4295…

MALICIOUS

PDF

39.1 KB Created: 2020-08-14 20:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffc2f4eaa3daa86dd4bf6f321ea5804c SHA-1: 7901f7d0aa138c525fd4ede4bba495df33c991d1 SHA-256: 9d8119d8f58b42957413c71af459845e6d16ea16b2fac71a3514c7a3dd41ba40
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, specifically `https://ttraff.com/pify?keyword=physical+science+high+school+textbook+pdf`. This indicates the document is designed to trick users into visiting a malicious site by appearing to offer a textbook PDF. The presence of numerous other links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the primary attack vector is the malicious redirector.

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=physical+science+high+school+textbook+pdf
    • http://files.burghyart.com/uploads/1/3/1/4/131406977/493852524.pdf
    • http://files.ucporegon.org/uploads/1/3/2/6/132682627/waxazutonakezanep.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/repajapudijub.pdf
    • https://cdn.shopify.com/s/files/1/0438/4571/4077/files/nufijuxikusipa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/riganobibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/classroom_rules_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/4464/1695/files/good_discord_setup.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/69391343618.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/getukemamar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zogubarekerebadopotuleju.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/50673200415.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/77750512547.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_off000059ca.bin
7677154210c73fa669edcbcb04b5baefa7818bcfe45a863a16b9e71744bfa447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59CA 5696 bytes
font_01_sfnt_off00006d29.bin
42d6ddd3af82c3782886943daec5355b3948c26c88e4fab58a98426685b2c871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D29 10192 bytes

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