Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85b9a12d9b9753f…

MALICIOUS

PDF

34.0 KB Created: 2020-08-16 18:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 809b549c0d82b3b58343fd339ba527de SHA-1: 867b554060cfa4f498659e850a0124eabef5c635 SHA-256: a85b9a12d9b9753f56df1b2f681d7e289abfb9b33de8a06b8da9d7b796a4c4fc
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, many of which point to external PDF files hosted on various domains. One URL, 'https://ttraff.cc/pify?keyword=noni+blackbird+song', is identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to manipulate search engine results or distribute malicious content. The presence of these links and the redirector strongly suggests a malicious intent, likely for SEO manipulation or phishing, though no specific malware family is identifiable from the provided evidence.

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.cc/pify?keyword=noni+blackbird+song
    • http://jomug.australianworkingadventures.com/uploads/1/3/1/3/131383483/fumebojubadekom.pdf
    • http://files.corpseapple.com/uploads/1/3/1/3/131384559/bezunonupurotefosapi.pdf
    • http://fejafa.ouhsdra.org/uploads/1/3/1/4/131406403/xetopuwidom_pagojajokelulaz.pdf
    • http://karevoriw.vaporstopgreenville.com/uploads/1/3/2/6/132682905/5497288b32e78.pdf
    • http://files.iwritebookspub.com/uploads/1/3/0/8/130814225/mopenovib.pdf
    • https://cdn.shopify.com/s/files/1/0433/2083/6254/files/vigupomozifug.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/81928599613.pdf
    • https://cdn.shopify.com/s/files/1/0431/4791/9516/files/factoring_polynomials_gcf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/proyecto_caldera_de_vapor.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/kidofol.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/50009182342.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/40771645391.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/18960440836.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/81195067172.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/89490353746.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevadijuxirefasu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9867/6131/files/vubovunozelomexadoba.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/76196626184.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_off0000488c.bin
173453ad5dd8a128821c999cf422320cab7b02c1794ccbae6bc62910522c9781
pdf-font-stream PDF embedded font (sfnt) at offset 0x488C 5280 bytes
font_01_sfnt_off00005a85.bin
d2513c5e24776802ecbd5316b7b7fa0d1fd47efe11a8c75411f425c855601111
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A85 9540 bytes