Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa34f156a28510ab…

MALICIOUS

PDF

41.0 KB Created: 2020-09-10 03:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ab32422304498d63267724e04aed1da SHA-1: e116e41d3346772e18dc749bc62effb6b6d137d5 SHA-256: aa34f156a28510ab56a1521448f7f1cbed84ccd65fe2a42dca3b50e7247f9aa0
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One critical heuristic indicates these links point to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are consistent with this finding. The primary intent appears to be directing users to malicious sites, potentially for SEO spam or phishing.

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.club/pify?keyword=identifying+solids+worksheet
    • http://files.queensnycellphonerepair.com/uploads/1/3/1/6/131636984/tevemora.pdf
    • http://files.utadrc.org/uploads/1/3/1/3/131384098/2557117.pdf
    • http://files.lucaturrini.com/uploads/1/3/2/6/132695306/5aca2.pdf
    • http://nanif.lasvegasymf.org/uploads/1/3/1/0/131069934/pabutatubon_xovepaboveniz_nixomoxovududam_xodikabonovuwog.pdf
    • http://files.cweissworks.com/uploads/1/3/2/6/132696174/c31faa7d.pdf
    • http://pilubape.tatry-group.com/uploads/1/3/1/0/131070420/ef1456d67923ff.pdf
    • http://files.green-hopefoundation.com/uploads/1/3/1/3/131398555/zedugov.pdf
    • http://weniwomo.rhynlight.com/uploads/1/3/0/8/130873998/573762.pdf
    • http://files.mightyscholarspreschool.com/uploads/1/3/1/1/131164488/5486528.pdf
    • http://files.bmhcounseling.com/uploads/1/3/0/7/130739366/fafijorikidon.pdf
    • http://weniwomo.rhynlight.c
    • https://static.usrfiles.com/ugd/430cb2_79c0a17cb7e041c5b4c0d1d6e55b2ba0.pdf
    • https://static.usrfiles.com/ugd/2ddd39_7674b3b58d904434821ecbc7edeb92c1.pdf
    • https://static.usrfiles.com/ugd/7f16bd_1ad6f3445e90496fbac9f43c8be9bc29.pdf
    • https://static.usrfiles.com/ugd/4c3d6a_5aab30a639514663a183f5f11bb3e4b7.pdf
    • https://static.usrfiles.com/ugd/963627_2e784395115641e893602c1d86960c9a.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_off0000621c.bin
b02f971a5a1c50a23fef014b7a6dfd10f065ce57b1343e04f3529ce8d2472bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621C 5156 bytes
font_01_sfnt_off000073bf.bin
d9ad54e0f6b1b2704188d5cc5a30780a8251106d9709231107a531588a11b3b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73BF 10184 bytes

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