Malicious PDF — malware analysis report

Static analysis result for SHA-256 a25c66f5339d1a4a…

MALICIOUS

PDF

37.9 KB Created: 2020-08-21 02:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84d810a1a616394d11818f964d8c5661 SHA-1: c165e705b91c7864fa0478b7387f9ee5c8c3ee56 SHA-256: a25c66f5339d1a4a6d284f7b85de7feefd9e12a57a3382e953cd13f09208b480
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one prominent link leading to a known malicious redirector. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=street+fighter+3+android+apk+free', which is presented as a lure for a game download. This suggests the primary attack pattern is to redirect the user to malicious infrastructure.

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=street+fighter+3+android+apk+free
    • http://files.sbpom.org/uploads/1/3/0/8/130813841/nujejebuwarorux.pdf
    • http://files.greatimpressionsstaging.com/uploads/1/3/0/8/130874110/fivosimifafase.pdf
    • http://mukona.bayareaflightinstruction.com/uploads/1/3/0/9/130969690/zakadogamov.pdf
    • http://files.minecraftintheclassroom.com/uploads/1/3/1/6/131636988/8819793.pdf
    • http://files.tryhardkitchen.com/uploads/1/3/1/4/131437977/2c85a.pdf
    • https://cdn.shopify.com/s/files/1/0434/5751/1590/files/gofesunabifexuxadupafib.pdf
    • https://cdn.shopify.com/s/files/1/0432/4543/7083/files/carbohydrates_importance.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/47205083099.pdf
    • https://cdn.shopify.com/s/files/1/0431/7118/4794/files/pdf_reduce_size_file.pdf
    • https://cdn.shopify.com/s/files/1/0462/2401/5514/files/ffxiv_fashion_report_points.pdf
    • https://cdn.shopify.com/s/files/1/0428/3901/5580/files/27762391063.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/42754125655.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4359/files/zozag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004822.bin
75ba77292a8478e96f5f15ead960bb1c49427c6a02e0d3c3cc225056f3d482ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4822 3624 bytes
font_01_sfnt_off0000550b.bin
d63e875d02b1fb62c2bf0157ea420af0519c428fe6191d8f888a25a14e9125aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x550B 5424 bytes
font_02_sfnt_off00006772.bin
1927fae10fe4c680e8f3ed5d578d0a74186a99d828d6cbeb8e53709a1e619701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6772 10276 bytes

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