PDF malware analysis — malicious · 214c6565359bcde0

MALICIOUS

PDF

43.7 KB Created: 2020-08-29 19:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 35b1c631ddd52e882aa023d1414fbae7 SHA-1: 42e2b7e35044f4385b4892a7e4c35b71176b4960 SHA-256: 214c6565359bcde01d068b34edf3985150adb712bae6f1b3288faa410998e4c4

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.ru, which is disguised as a simple investment agreement. This indicates a social engineering lure designed to lead the user to malicious content. 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.ru/wix?keyword=simple+investment+agreement
- https://cdn.shopify.com/s/files/1/0430/0580/4698/files/73502605421.pdf
- https://cdn.shopify.com/s/files/1/0434/4492/8674/files/44675727990.pdf
- https://cdn.shopify.com/s/files/1/0431/9579/3557/files/being_nocturnal_read_theory_answers_grade_8.pdf
- https://cdn.shopify.com/s/files/1/0430/4486/4149/files/moviescounter_com_kabir_singh_movie.pdf
- https://cdn.shopify.com/s/files/1/0429/8565/2375/files/zixediluxejobaxojujik.pdf
- https://static.usrfiles.com/ugd/b8c837_e9df1785c73f44e180cbcac098638223.pdf
- https://static.usrfiles.com/ugd/7ff653_27f99c01a0e743e995d640510cdde55d.pdf
- https://static.usrfiles.com/ugd/5be868_e8c083bcb74744708eeb61c3dbdaad6c.pdf
- https://static.usrfiles.com/ugd/b8c837_0536c9bc57ad472bbb5a5fa32ff314f3.pdf
- https://static.usrfiles.com/ugd/b8c837_c193e1e9e1414d5ea30560e1a7f364b9.pdf
- https://static.usrfiles.com/ugd/b8c837_f0ceb76f11bf450f9b8eb1456e97ef89.pdf
- https://static.usrfiles.com/ugd/b8c837_d574a1fad25840d6a443539307cf5dd8.pdf
- https://static.usrfiles.com/ugd/b8c837_580575a57c014bba9314d1ad3098713d.pdf
- https://static.usrfiles.com/ugd/b8c837_50d717412911452c9e850a5bb5fc6dc9.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_off00006d2e.bin` `3c207d3b79b0484bc63363e0e8006fa54d7e7e44a9039182bf5fced0bc6b3bfb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D2E	5304 bytes
`font_01_sfnt_off00007f1c.bin` `1211177816a5c7d93326ecfbfadbf2f2d655c2e34c9cdb72debc682a0eca1a1c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F1C	10300 bytes

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