PDF malware analysis — malicious · f8f8d92df2bfb742

MALICIOUS

PDF

35.7 KB Created: 2020-08-04 21:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b8296112f23005919f12ad53bb65a63d SHA-1: 68f639023fd430d063bf6b72c04716dd0770e5f2 SHA-256: f8f8d92df2bfb742d3b20744df4123d3ebb1a765f77a34973ddfd27b9fbca515

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=4th+grade+math+practice+book+pdf'. This URL is presented within the document body, disguised as educational material. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious.

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=4th+grade+math+practice+book+pdf
- http://files.fyidanceclub.com/uploads/1/3/1/3/131380177/27a5b96.pdf
- http://woxamu.kennylakehawks.com/uploads/1/3/0/7/130775732/701e82.pdf
- http://files.imagereplicas.com/uploads/1/3/2/7/132741110/e8afc6fe31b2.pdf
- https://cdn.shopify.com/s/files/1/0432/8305/4757/files/19845779390.pdf
- https://cdn.shopify.com/s/files/1/0431/4349/5841/files/jexukixazowarope.pdf
- https://cdn.shopify.com/s/files/1/0431/2976/6039/files/81009551849.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mowajuvide.pdf
- https://cdn.shopify.com/s/files/1/0431/5149/1233/files/jobokevopijuxerelibin.pdf
- https://cdn.shopify.com/s/files/1/0438/2015/5037/files/59945101056.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdf
- https://cdn.shopify.com/s/files/1/0440/1440/3742/files/53079899599.pdf
- https://cdn.shopify.com/s/files/1/0438/4794/2304/files/windows_hosts_file_format.pdf
- https://cdn.shopify.com/s/files/1/0440/3865/2069/files/fobir.pdf
- https://cdn.shopify.com/s/files/1/0440/8446/1720/files/84142225488.pdf
- https://cdn.shopify.com/s/files/1/0432/3452/5352/files/bobol.pdf
- https://cdn.shopify.com/s/files/1/0427/6974/4028/files/besirarevegavusuwijuk.pdf
- https://cdn.shopify.com/s/files/1/0432/4989/3531/files/vyond_comedy_world.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_off00004c43.bin` `db2bf89c29900d251e6bee1d2bc676e4cbb27702608b38b3aa4176753f4733b6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4C43	5556 bytes
`font_01_sfnt_off00005f01.bin` `4a49165f222422a3a22aeaddbb6c57e0249f85777a9c4a203915c92700b275b8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F01	10160 bytes

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