PDF malware analysis — malicious · 1f3f786737a73fc7

MALICIOUS

PDF

53.0 KB Created: 2020-08-13 12:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b7db73bd3297160c561fdba7feae69db SHA-1: 3f4b552c1c2f507a4f083f4f7a4aa3511feb0266 SHA-256: 1f3f786737a73fc76737d347a141b4ac144f75db3a4a7aab49fcf770c1be80ed

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

This PDF file contains a malicious redirector link disguised as a "Latex tikz manual pdf". The ML classifier strongly flagged this PDF as malicious, and heuristic analysis identified it as a redirector and part of a link farm. The primary IOC is the malicious redirector URL, which is likely used to lead the user to a further malicious resource.

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/wb?keyword=latex%20tikz%20manual%20pdf
- http://files.cninc.org/uploads/1/3/2/7/132740479/5324237.pdf
- http://mifoburej.markesanbiblechurch.org/uploads/1/3/0/9/130968921/2288967.pdf
- http://files.slukappasigma.com/uploads/1/3/1/3/131379183/9b494989b.pdf
- http://fagul.itiskismet.com/uploads/1/3/1/1/131163590/kowulanakasov_kuditatikukupi_sowilomiz.pdf
- https://cdn.shopify.com/s/files/1/0429/8581/6217/files/83038504398.pdf
- https://cdn.shopify.com/s/files/1/0431/7220/0608/files/46575542516.pdf
- https://cdn.shopify.com/s/files/1/0432/3164/1762/files/xikusapupakakuzunap.pdf
- https://cdn.shopify.com/s/files/1/0432/9357/3284/files/topixomi.pdf
- https://cdn.shopify.com/s/files/1/0433/7978/5891/files/free_printable_phonics_worksheets.pdf
- https://cdn.shopify.com/s/files/1/0438/6645/6224/files/mathematics_of_finance_eighth_edition.pdf
- https://cdn.shopify.com/s/files/1/0431/1914/9216/files/riworigasilixiza.pdf
- https://cdn.shopify.com/s/files/1/0435/6459/7397/files/it-_201_2017.pdf
- https://cdn.shopify.com/s/files/1/0437/1120/1435/files/76770537538.pdf
- https://cdn.shopify.com/s/files/1/0430/7740/2778/files/senelejisorato.pdf
- https://cdn.shopify.com/s/files/1/0431/1243/1776/files/sumara.pdf
- https://cdn.shopify.com/s/files/1/0430/3945/7431/files/12662780681.pdf
- https://cdn.shopify.com/s/files/1/0435/8835/4207/files/fuloluluzi.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000747d.bin` `b92f9de6d3665e82b15c3af602a46205d752a8049f1d0edbb5def656749a98f9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x747D	5036 bytes
`font_01_sfnt_off000085a4.bin` `73a12547550cc5519e55e4bdeb3553444e2c065640370321ce7bea62d5fd754e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85A4	13656 bytes
`font_02_sfnt_off0000b1e9.bin` `2650953734bc47387e7657ecfda98388c46aab4f6ce1b70d6c4123b7a8b84dab`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1E9	16116 bytes

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