Malicious PDF — malware analysis report

Static analysis result for SHA-256 b623dcecacac9653…

MALICIOUS

PDF

61.8 KB Created: 2020-09-18 14:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90a2a44cb294861f10645eae00849d39 SHA-1: 3a69261f6775568dcfe87f4242f93c32a79970f8 SHA-256: b623dcecacac96533ed0433ea2bfe20f4c4efc1e38094479eb35b09328ad033f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'vertical angles and linear pairs worksheet pdf' and includes the malicious URL. This suggests a social engineering tactic to drive traffic to malicious sites, likely for further exploitation or credential harvesting. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.link/pify?keyword=vertical+angles+and+linear+pairs+worksheet+pdf
    • http://wixexe.trupbsc.ca/uploads/1/3/1/0/131069869/4468639.pdf
    • http://titavam.neemaedwardmkwelelewellnessfoundation.org/uploads/1/3/1/8/131872303/vudavab.pdf
    • http://wobeke.livebeyondthelens.com/uploads/1/3/1/4/131406286/4132689.pdf
    • http://files.sigma.graphics/uploads/1/3/0/8/130814902/koxojodaz-gamuweweti-wenepago.pdf
    • https://eae5466c-f8f9-4388-93f5-91ce3a3896bc.filesusr.com/ugd/696117_218a8db4bf1147be9ba579659b57ff0c.pdf?index=true
    • https://3386a8c0-236f-4407-9ace-cb6a2c5d9d58.filesusr.com/ugd/4dd980_010c0fafe55e4aefa14b7093966370d6.pdf?index=true
    • https://684450c8-b6c5-4eed-a2a1-a54913d1f35c.filesusr.com/ugd/aaaf79_39ba2c2404ba44a396852bb1aef99a87.pdf?index=true
    • https://a58e86a3-8a74-4eb4-8e16-a40965d1838c.filesusr.com/ugd/2d1648_4b34cf842350445599a7db14ac0b4639.pdf?index=true
    • https://50d266dd-0361-4054-9b27-93d0a759280b.filesusr.com/ugd/74e9cf_79e617f3459749c9beda5a149eb232b3.pdf?index=true
    • https://a5907828-2996-4464-8472-4b3e10786e16.filesusr.com/ugd/a4c1fa_1808bf5899a44cd6926869d2428e1574.pdf?index=true
    • https://92a995a6-51b4-458f-87b6-9f094e801f24.filesusr.com/ugd/54b9a1_2ea317a6b0594df1baa0544d7b15e4ae.pdf?index=true
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b29.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B29 2828 bytes
font_01_sfnt_off0000a523.bin
725aa2a36a584ac57ca55396a574bf365e6d614c93ef4a63be5b7c5fb665aaa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA523 5328 bytes
font_02_sfnt_off0000b749.bin
4c69cfe95be16be757bd146537229264a161f1b026413d4b838b8f59c1f684eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB749 9976 bytes
font_03_sfnt_off0000d94c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 4324 bytes

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