Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b392c1beb526f9…

MALICIOUS

PDF

43.0 KB Created: 2020-08-07 17:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f036a8adba84eaa1586086d3c934eb5 SHA-1: 0211ddd8b9fb1f6dc4a7a0e3dcb2733de5b41bf3 SHA-256: a4b392c1beb526f97b076c20ebe53afb7ae8d4b9d4318c77a0ca6b4c8ff40a1b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.ru/pify?keyword=pliny+the+elder+clone+pdf'. Another critical heuristic identified a mass external PDF link farm, with many links pointing to Shopify domains. The document body contains garbled text but includes the same redirector URL and several Shopify URLs, suggesting a coordinated effort to distribute malicious content or engage in SEO poisoning. 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.ru/pify?keyword=pliny+the+elder+clone+pdf
    • http://files.gemsandequipment.com/uploads/1/3/1/6/131637081/gafufaw.pdf
    • http://jazogux.thedemeterfoundation.com/uploads/1/3/1/4/131407089/jizuragib.pdf
    • http://files.renewholisticwellness.shop/uploads/1/3/1/3/131381901/2309352.pdf
    • http://files.amdsbesl.com/uploads/1/3/0/7/130740617/gijejiw-xopebudedoral-ronosa-didugenumuzuwo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/86834424764.pdf
    • https://cdn.shopify.com/s/files/1/0432/5965/8398/files/410_pump_shotgun.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7181/files/wiiu_usb_helper_title_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/aparato_respiratorio_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/39860751318.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/10_miles_to_kilometers.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/tamil_bluray_movie_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/91261009444.pdf
    • https://cdn.shopify.com/s/files/1/0450/4154/9462/files/ashrae_handbook_of_heating_ventilating_and_air_conditioner_applications.pdf
    • https://cdn.shopify.com/s/files/1/0432/3367/3380/files/35190848189.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.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_off00006807.bin
646dd90fc9e9fee3b78699521e3bcbfd72723232509f73134315f7bf1511b313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6807 4960 bytes
font_01_sfnt_off000078ec.bin
89002c4d3ab8b02ae4fc42c9f7e3819c99f24c94df20d0e7b026a8c43ca5ff6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EC 11252 bytes

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