Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb5fc36c25bab37…

MALICIOUS

PDF

37.7 KB Created: 2020-08-06 20:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abb0243021a669c81efc2b1285373baa SHA-1: 9450182a016390badbb580120f8f3aae847c3dd0 SHA-256: 1bb5fc36c25bab378e6ec71427f226be7c7554b6ab0db7fffa17a8e8616deab6
150 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. This URL is embedded within the document body, disguised as a link to a PDF. The file also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains. The primary malicious URL is https://ttraff.com/pify?keyword=anthony+biggs+mathematics+for+economics+and+finance+pdf, which likely serves as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=anthony+biggs+mathematics+for+economics+and+finance+pdf
    • http://tefexom.buggytownbirddogs.com/uploads/1/3/0/7/130738531/radaje_lagoxow_fuxobafobewig_tejos.pdf
    • http://ririni.sweetheartbakeryonline.ca/uploads/1/3/0/9/130969368/541448.pdf
    • http://files.leeabberton.com/uploads/1/3/1/3/131398547/a451303eb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/22570805795.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6840/files/dopetozej.pdf
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/67659556515.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/98385666630.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/kijugub.pdf
    • https://cdn.shopify.com/s/files/1/0433/5543/9263/files/schema_amplificateur_de_puissance_1000w.pdf
    • https://cdn.shopify.com/s/files/1/0432/1280/0159/files/microcrystalline_cellulose_properties.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7378/files/antibioticos_tipos_y_clasificacion.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/break_even_analysis_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0434/5616/8093/files/kujewimot.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/73150905476.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_off00005394.bin
c78a88f28f6b1601c89b8b0d11b7e156020cebe13326501fd3cabaf9c60d4ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5394 5768 bytes
font_01_sfnt_off00006720.bin
8d2f4507d41df5b6cff019d7b9817e43b0be5268ac70458728521ec0c8839c5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6720 10176 bytes

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