Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a9269fbb2e26f6…

MALICIOUS

PDF

40.3 KB Created: 2020-08-01 01:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5da6209dff4f8bec990d4f829bf4de6 SHA-1: bb94a39ebf1402bbb33bcb8b32bf98c96d1dd051 SHA-256: 52a9269fbb2e26f64a5ea85981f463e905b9c28b3c6407b035cf39a9b629ee7c
150 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 PDF link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=marble+balst+online', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL. The presence of a large number of external links, including the malicious redirector, suggests an attempt to direct users to harmful content or infrastructure.

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.ru/pify?keyword=marble+balst+online
    • http://files.highstchiropractic.com/uploads/1/3/0/8/130874217/musedodularapaka.pdf
    • http://files.myroyalorganics.com/uploads/1/3/0/8/130814423/6335139.pdf
    • http://files.vgyachtdesign.com/uploads/1/3/1/8/131856883/9639888.pdf
    • http://files.rebeccakastleman.com/uploads/1/3/1/4/131438419/2747017.pdf
    • http://files.whenyousuckatrunning.com/uploads/1/3/0/9/130969897/zevel_vasujumopeni.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/gta_4_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/48877721367.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/82718142763.pdf
    • https://cdn.shopify.com/s/files/1/0437/9305/5904/files/16397163139.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/suvopagogiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/wegisatilujired.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3138/files/topidesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6598/3655/files/xolapiwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2617/6407/files/68444665206.pdf
    • https://cdn.shopify.com/s/files/1/0440/4386/2181/files/20125094971.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/please_find_attached_the_file_you_requested.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_off00006065.bin
eb5dfce9e68f1755df72fbda1884d795572758caf531568c93520b9141e708fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6065 4824 bytes
font_01_sfnt_off000070e0.bin
8071bb269fc32976aebe8f3e8510c653f1eefb29293ac8ec96a10ec48352cf29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E0 10456 bytes

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