PDF malware analysis — malicious · 823d7e4efc1202b9

MALICIOUS

PDF

55.8 KB Created: 2020-08-23 01:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d3f707f13ac7b978b610addd74a99d32 SHA-1: 932bda7026c02d6883c0fe47a9213d8411b0d0c5 SHA-256: 823d7e4efc1202b9c4819eb47b785fab07554f3fef1019981a6f1e095107a4a2

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, including one pointing to a known malicious redirector. The document body and heuristics indicate a link farm strategy, likely intended to redirect users to malicious sites for further exploitation. The ML classifier strongly supports the malicious verdict.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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.com/pify?keyword=christmas+songs+tagalog+free
- http://files.silverlakebarroncounty.com/uploads/1/3/1/6/131607103/finufi-gematitafodaz-girekimu.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0433/5042/5750/files/45126979244.pdf
- https://cdn.shopify.com/s/files/1/0440/5932/8662/files/brainstalks_risk_of_rain_2.pdf
- https://cdn.shopify.com/s/files/1/0433/4456/0281/files/7737601735.pdf
- https://cdn.shopify.com/s/files/1/0430/0016/8597/files/77955223568.pdf
- https://cdn.shopify.com/s/files/1/0431/7688/6431/files/datifanafukapavot.pdf
- https://cdn.shopify.com/s/files/1/0434/5207/2089/files/bluebird_promise_all.pdf
- https://cdn.shopify.com/s/files/1/0434/1851/7665/files/gezerub.pdf
- https://cdn.shopify.com/s/files/1/0437/6467/8817/files/kiledujulixawobujosexu.pdf
- https://cdn.shopify.com/s/files/1/0431/0204/4316/files/tipibar.pdf
- https://cdn.shopify.com/s/files/1/0437/5989/4689/files/56188437491.pdf
- https://cdn.shopify.com/s/files/1/0428/6126/5062/files/71087173541.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00009a16.bin` `0707ece5f781eff02cca77e20eb5f1da5a93bad49d5437e0fd0403ccc640e34a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9A16	5084 bytes
`font_01_sfnt_off0000ab3a.bin` `b61607f5f9c971fe4a29379ecf34dc0d98a75ee27217d7b5efc5b66c1eb1d62e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAB3A	12152 bytes

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