Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbe97ac9f1a9a14…

MALICIOUS

PDF

45.7 KB Created: 2020-08-06 07:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 723113223d8d42fba7e7d35dfd9d7478 SHA-1: 0232c040356dbc3fe5449b00412074ffb1cb97c6 SHA-256: 1fbe97ac9f1a9a14ecaa1911ffe55604fde93afe2355e0a932fd5b100f02e748
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body also contains the same URL, presented as a search query for merging PDF files. This suggests a social engineering lure to trick users into clicking the link, which then likely leads to a malicious payload. The file also contains a PDF link farm heuristic, indicating it's part of a larger SEO manipulation scheme.

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.ru/pify?keyword=comment+regrouper+plusieurs+fichiers+pdf+en+un+seul+gratuitement
    • http://files.clictab.com/uploads/1/3/1/4/131483307/pununukikaw.pdf
    • http://wawunad.caribbeanshadeproducts.com/uploads/1/3/0/8/130874359/gogapogijezuvupe.pdf
    • http://files.mammothmosaic.com/uploads/1/3/0/7/130740050/dde23e1b571ea1.pdf
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/mubenux.pdf
    • https://cdn.shopify.com/s/files/1/0434/4699/3052/files/tujufenopulun.pdf
    • https://cdn.shopify.com/s/files/1/0437/3181/2504/files/manual_de_operacion_de_calderas_de_vapor.pdf
    • https://cdn.shopify.com/s/files/1/0433/8145/7061/files/98849393936.pdf
    • https://cdn.shopify.com/s/files/1/0428/7329/0908/files/48977299472.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/basics_of_computer_architecture_and_organization.pdf
    • https://cdn.shopify.com/s/files/1/0440/8947/5237/files/xanojonosebokakozapet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/86736300629.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/39600921352.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/actex_exam_p_study_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2876/7143/files/54990829906.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_off00007044.bin
b4ea23a201db30c062f71f710c17fb1c3242cb6474bac0e0b3d4c7695c0fdf80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7044 5476 bytes
font_01_sfnt_off000082b4.bin
4b15fbc027a4e70fdc3f5d4b543a69e4cdec81b1ddbdac88c82d14a236fa3fe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B4 11688 bytes

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