Malicious PDF — malware analysis report

Static analysis result for SHA-256 99883f12f4aa7ccb…

MALICIOUS

PDF

40.5 KB Created: 2020-08-07 13:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 618704dfc6639133c79d72e285eebddb SHA-1: b385ca9aa6165581832f201892aed661308387aa SHA-256: 99883f12f4aa7ccb60f3ca47487b386b8775133483d490574b777475cc0c17d4
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=fundamentals+of+analytical+chemistry+pdf'. This indicates the document is designed to trick users into navigating to a potentially harmful site. The presence of a PDF link farm heuristic further suggests a mechanism for distributing malicious content or SEO manipulation. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=fundamentals+of+analytical+chemistry+pdf
    • http://files.alexstudio.bg/uploads/1/3/1/1/131164448/875fbb5e4c12d5.pdf
    • http://wapaso.pinerivernewfs.com/uploads/1/3/1/0/131070872/3860566.pdf
    • http://files.cwurochester.org/uploads/1/3/1/1/131164198/5880591.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/dakazigaragovega.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/nazi_minecraft_skin.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/73821835156.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/texuput.pdf
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/71664027683.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0724/files/water_hammer_in_pipe_line_systems.pdf
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/certificate_of_completion_and_compliance.pdf
    • https://cdn.shopify.com/s/files/1/0427/8448/9631/files/91647212864.pdf
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/kidiga.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/90314350867.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/22156375071.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_off00005f26.bin
4e50aaa521cdf56e2c95d52f000e2ff57c5a55bbb31782d1fdca4160f7d437f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F26 5452 bytes
font_01_sfnt_off00007190.bin
8717dde8b6775433885f69a93491c28bb957760b1083074ebde211e236064af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7190 10432 bytes

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