PDF malware analysis — malicious · d5010fe4425102a0

MALICIOUS

PDF

45.3 KB Created: 2020-08-31 02:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cd3219d04be86f93012c7dc1c6c175a0 SHA-1: f3c6ada339e4e762e4bf9a4227bac21dac802fc6 SHA-256: d5010fe4425102a0349723d590e6203a74006a842f71021c455f7a650814e95e

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a link disguised as 'Adobe illustrator certification prac' which leads to a malicious redirector. The PDF also hosts a link farm of other PDFs on Shopify, likely for SEO manipulation to increase visibility. The ML classifier strongly indicated maliciousness, and the embedded URL heuristic confirms the presence of a link within the document body.

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.cc/wix?keyword=adobe+illustrator+certification+prac
- https://cdn.shopify.com/s/files/1/0431/7600/1700/files/negewetutipi.pdf
- https://cdn.shopify.com/s/files/1/0434/7274/8710/files/kingdom_animalia_chart.pdf
- https://cdn.shopify.com/s/files/1/0439/7747/4206/files/16237395843.pdf
- https://cdn.shopify.com/s/files/1/0428/8629/9815/files/role_of_arab_league.pdf
- https://cdn.shopify.com/s/files/1/0464/1715/0120/files/61953536668.pdf
- https://cdn.shopify.com/s/files/1/0433/2906/1014/files/59607882673.pdf
- https://cdn.shopify.com/s/files/1/0432/7663/2220/files/dovigipojukiz.pdf
- https://cdn.shopify.com/s/files/1/0432/1991/0820/files/lonerinib.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
- https://cdn.shopify.com/s/files/1/0431/0827/0244/files/1046125191.pdf
- https://static.usrfiles.com/ugd/b8c837_d274c9f52c3740d0b0c48013583d06c0.pdf
- https://static.usrfiles.com/ugd/ee9d3f_ecf6275457aa4d21ad5314fc1c53cf1a.pdf
- https://static.usrfiles.com/ugd/77d535_8934799e456b47ba87d2e3eee5cbdf28.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/
- https://cdn.shopify.com/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000723a.bin` `3ef3024bfb2699a99345a6ddbf2f5cb6377aa945b2f34c455e59769f2ee488e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x723A	5276 bytes
`font_01_sfnt_off00008431.bin` `0538dc3549714d7a358622ce4dc93ccd1c24d2d77de90c187655d5c1cbb2f79c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8431	10664 bytes

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