PDF malware analysis — malicious · e7fd6e443646c0bf

MALICIOUS

PDF

40.6 KB Created: 2020-08-30 09:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e4c8d259c94c5debb12b476c3bd9228e SHA-1: ac0e13493b07dc0b0846003528bde45cd50a05c2 SHA-256: e7fd6e443646c0bff75a7958119d5f11dbdece3b4552dd4be2b6a18758099e3d

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous other PDFs, with the primary link leading to a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=war+on+two+fronts+wow', which is also flagged by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This suggests a social engineering attempt to direct users to malicious content.

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/wix?keyword=war+on+two+fronts+wow
- https://static.usrfiles.com/ugd/8ab72e_4de7404a037447a9858f4f4ecca09e64.pdf
- https://static.usrfiles.com/ugd/e2c6c1_c5372f1816e64360b7747090627116b7.pdf
- https://static.usrfiles.com/ugd/374ce0_aef7ed01a0c04fa49bc8337c1a263ce4.pdf
- https://cdn.shopify.com/s/files/1/0431/3733/5464/files/74394220752.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
- https://cdn.shopify.com/s/files/1/0430/9614/6074/files/66106696797.pdf
- https://cdn.shopify.com/s/files/1/0433/9515/4070/files/56795435421.pdf
- https://cdn.shopify.com/s/files/1/0435/1072/6815/files/zafolevonodiferaropefid.pdf
- https://cdn.shopify.com/s/files/1/0431/8694/6206/files/61353308002.pdf
- https://cdn.shopify.com/s/files/1/0433/5999/4014/files/annexure_e1_for_hssc.pdf
- https://static.usrfiles.com/ugd/b8c837_674781065962444f941d623837850560.pdf
- https://static.usrfiles.com/ugd/8cbfce_45d6d489b436485e9e1ecf7ffaa3aace.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_off000061e8.bin` `45efe4cbe884c05b94b4a2f9ba2cc66323608335919b9c2514484c824a4d0a44`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61E8	4832 bytes
`font_01_sfnt_off0000727d.bin` `9ce6b5a0c4f48e6970dd226eced031e014575b5fc95689800e8267764c07bfa2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x727D	10324 bytes

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