Malicious PDF — malware analysis report

Static analysis result for SHA-256 8640f693ff2bea28…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 11:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9687a4f939453ccbc34fefbf3401c3e3 SHA-1: 07fb564cee56e3be3c2486b7be366da5be0ad9fb SHA-256: 8640f693ff2bea289b618c6c80fb1ec5b627666c58acfe151237803807da81eb
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.ru/pify?keyword=developing+android+app+python'. Additionally, another critical heuristic detected a PDF link farm, indicating a large number of embedded external PDF links, with 'https://cdn.shopify.com/s/files/1/0429/1425/0905/files/28227027461.pdf' being one of the first identified. The presence of numerous links suggests an attempt to manipulate search engine results or to distribute further malicious content.

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=developing+android+app+python
    • http://files.thecastlespa.co.uk/uploads/1/3/1/4/131407802/bositoliluw.pdf
    • http://files.rangelandwildlife.com/uploads/1/3/1/4/131438448/turesofu-molodixuxefi-suloduwo.pdf
    • http://files.luciadisanto.com/uploads/1/3/1/0/131069789/9563369.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/28227027461.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6269/files/9085445642.pdf
    • https://cdn.shopify.com/s/files/1/0439/8612/4958/files/adjacency_list_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/5421/0980/files/weight_loss_exercise_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0452/5893/2381/files/pokesonuno.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/31045018908.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/pandas_to_csv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5026/9849/files/83347139873.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/dududevuroxuwatusaxib.pdf
    • https://cdn.shopify.com/s/files/1/0449/7453/8920/files/jahiem_the_makings_of_a_man.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_off00005ed4.bin
d0937cf45fed51c415d93993556d7eb69987316d630147982311863852c83ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED4 5204 bytes
font_01_sfnt_off0000708e.bin
f8482ab0c7b82ec632527767fd9401c8b16dc1532653c93d335e618349a7c1d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708E 10148 bytes

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