Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60bd5081a85674a…

MALICIOUS

PDF

39.8 KB Created: 2020-08-22 06:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 613fbb5d29049fab2fb040846fa0c77c SHA-1: 645f10a8163984e5ff04c5ed66900c0d3fea78ab SHA-256: f60bd5081a85674a87f4eca61a0db0b4954190b9e27a57b3f88e57f10882325a
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one heuristic identifying it as a link farm and another flagging a specific redirector URL. The document body, though heavily obfuscated, contains text related to 'simple and compound interest worksheet answers pdf', suggesting a lure to disguise the malicious intent. The primary malicious link identified is https://ttraff.ru/pify?keyword=simple+and+compound+interest+worksheet+answers+pdf, which is likely used to redirect the user to 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=simple+and+compound+interest+worksheet+answers+pdf
    • http://wofije.ancientwavestudios.com/uploads/1/3/1/8/131857120/f7beaf128.pdf
    • https://cdn.shopify.com/s/files/1/0448/0339/1645/files/irecover_data_recovery.pdf
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/lupudiwedetipuwabaverulu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/anemia_drepanocitica_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/ripiwitalomiwizali.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/jijakekamu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/89914596565.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/xowusadijamugelimitut.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/64286250382.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/delewekigesem.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1638/files/pajupowaregumevufixiko.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_off00005c1f.bin
6aa8360fb4bd715485d66ab24bd3cb6f0ebe1bf8e86a42cc73ea627673946e8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1F 5656 bytes
font_01_sfnt_off00006f3a.bin
05e52770a81a622082aedc1a4870aa706793e17982de0aca3e8f2005d66d27eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3A 10276 bytes

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