Malicious PDF — malware analysis report

Static analysis result for SHA-256 f023f2ed87e7c4d4…

MALICIOUS

PDF

35.2 KB Created: 2020-08-14 18:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1b45406c6b4497e8c717dfd26ae0c5d SHA-1: c9a82b651a5a12c81aee53c05b1856f2f0947db0 SHA-256: f023f2ed87e7c4d4c94b26bcd598907a34565d3c72125001899ef12de0524613
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though obfuscated, contains the same URL, suggesting it is the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine visibility for 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=alter+ego+b1+guide+pedagogique
    • http://files.mrstuckeysclass.com/uploads/1/3/0/7/130776841/4143467.pdf
    • http://files.niassestudios.com/uploads/1/3/0/8/130874318/b919e96e4ba.pdf
    • http://files.inspiretkd.com/uploads/1/3/1/3/131380456/mijonevopil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56802730071.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/7014600715.pdf
    • https://cdn.shopify.com/s/files/1/0446/5927/7987/files/nuwave_oven_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/bugabofezenavemodi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1092/4437/files/regujoxipebewerejezepak.pdf
    • https://cdn.shopify.com/s/files/1/0432/0064/3236/files/nasagebi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4532/0861/files/70242963154.pdf
    • https://cdn.shopify.com/s/files/1/0432/6896/4505/files/canara_bank_credit_card_application_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/30686352204.pdf
    • https://cdn.shopify.com/s/files/1/0437/2211/3192/files/50469030845.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_off00004c6d.bin
6da08c28add1153cbfcd9a906b4b4d6499b49b117159994062a5805c40533fc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C6D 5256 bytes
font_01_sfnt_off00005e51.bin
8927fc1e6d7f985afcf9211d85e34c30c898c08ee89525f8798b284bcda87a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E51 9928 bytes

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