PDF malware analysis — malicious · 93722bb37cda0695

MALICIOUS

PDF

35.6 KB Created: 2020-08-31 22:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a084dcad26f17dd96a26cd9991e2cf65 SHA-1: 607f06f8cd888ee3fd1df2af08e016ae598c00bb SHA-256: 93722bb37cda06952037e2d858a33c7ca60f901bd8b8707ceaa8fcff4247f741

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure disguised as educational content. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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=commas+in+dates+worksheets+for+second+grade
- https://cdn.shopify.com/s/files/1/0432/8433/2710/files/ubs_numerical_reasoning_test_wso.pdf
- https://cdn.shopify.com/s/files/1/0435/0817/0918/files/53072169292.pdf
- https://cdn.shopify.com/s/files/1/0432/6830/9152/files/63900136937.pdf
- https://cdn.shopify.com/s/files/1/0428/6539/3831/files/ruwelezud.pdf
- https://cdn.shopify.com/s/files/1/0435/0178/1156/files/14469206338.pdf
- https://cdn.shopify.com/s/files/1/0432/4173/4311/files/masokow.pdf
- https://cdn.shopify.com/s/files/1/0434/5056/4773/files/kalona_sale_barn_market_report.pdf
- https://cdn.shopify.com/s/files/1/0434/4250/3832/files/deramuso.pdf
- https://cdn.shopify.com/s/files/1/0432/2885/6477/files/verabide.pdf
- https://static.usrfiles.com/ugd/b8c837_cc37905c63864e108382a3c83f22ecf5.pdf
- https://static.usrfiles.com/ugd/f3cb45_0b9388d52c974b1985fc5a2f5b45b2f5.pdf
- https://static.usrfiles.com/ugd/b8c837_4882addf254c45429f8ddd300ca1c29a.pdf
- https://static.usrfiles.com/ugd/eaf48f_8571dcf91457474c8fc9625a4d0db10c.pdf
- https://static.usrfiles.com/ugd/b8c837_46a560164ed24750b3b965e884e7aac6.pdf
- https://static.usrfiles.com/ugd/7c3584_5b4c9d13f09b46f0a5051f8c02e61b1e.pdf
- https://static.usrfiles.com/ugd/b8c837_9151738f30464518a1a30bcad4501425.pdf
- https://static.usrfiles.com/ugd/8acad3_a43f8bd87b954dffbf21e0927e20cdeb.pdf
- https://static.usrfiles.com/ugd/b8c837_200f364c922e45bb91bc11556e7d4c61.pdf
- https://static.usrfiles.com/ugd/b8c837_d431b805142644bca6967532d48adb4b.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00004c8f.bin` `e88b58830895068450abde16e7eaf5c9884e34eb7797e36e62b846e617aa11f5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4C8F	5464 bytes
`font_01_sfnt_off00005f0a.bin` `9aba9d0c0b8d6f9213642309013af5def32b67236e74e3660dcc68f61d70160d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F0A	9948 bytes

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