PDF malware analysis — malicious · 18f302711cf169c7

MALICIOUS

PDF

41.3 KB Created: 2020-09-03 16:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e7ad734a5c178ce01a3f1d05e2f0ec35 SHA-1: e8580aa01212f7142adcab6699c1d08e4961a450 SHA-256: 18f302711cf169c71d143bf529c1e73c74c29e95dff2739da0b6a14b4108717f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, with one identified as a malicious redirector. The ML classifier also flagged the PDF with high confidence. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=awash+verb+forms' which is flagged as malicious. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic.

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=awash+verb+forms
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0432/1456/9631/files/ultrasound_guided_cortisone_injection_shoulder_cost.pdf
- https://cdn.shopify.com/s/files/1/0440/8059/5094/files/gofagopuxum.pdf
- https://cdn.shopify.com/s/files/1/0428/1604/5222/files/89800575953.pdf
- https://static.usrfiles.com/ugd/b8c837_bc15fbd2af7f40538e429bed6b43baaa.pdf
- https://static.usrfiles.com/ugd/d2751c_91e4f1c7b8a546b2953dbae492f8987e.pdf
- https://static.usrfiles.com/ugd/6da380_77ab8839c77247648864ea88e02e4a25.pdf
- https://static.usrfiles.com/ugd/a01749_42964e32be934ed5a4384d3bbc495f1e.pdf
- https://static.usrfiles.com/ugd/b8c837_b9dcbb7440464f94805d8184ef6f772f.pdf
- https://static.usrfiles.com/ugd/5b9365_147f8d0351564b9683be7c4f86ab7e17.pdf
- https://static.usrfiles.com/ugd/b8c837_9cbe3226fcdf442c910801843d1f1c5d.pdf
- https://static.usrfiles.com/ugd/0c8cc8_853ba913badf46e39ffcca45670e9cad.pdf
- https://static.usrfiles.com/ugd/760101_47c09f5fbb484cbb8f7b8024bb1e853d.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_off000060db.bin` `5328b2e1a90ba90fb70429d26983bcc779e1a50e24335e130f54f4b4d58da5fa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60DB	5256 bytes
`font_01_sfnt_off000072a5.bin` `2a1584b62f3febeb923114e026f15de97ff002a9c6a12fef5bd1fc2bb0f81d13`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72A5	10820 bytes

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