PDF malware analysis — malicious · 6cba4f649fd2c650

MALICIOUS

PDF

44.3 KB Created: 2020-09-01 00:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 908e975453d302581afd8b2d13592af1 SHA-1: 149bf034db1b5ac5daf422245c02669ba2e6dfe2 SHA-256: 6cba4f649fd2c65067ee5c1badf94be2d53427aead0fb813bab9673d9091c9fb

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One of the primary links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for the linked 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=authenticity+50+bed+sheets
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/b8c837_6f53ec0b69594ddd80c7ee7099861fe4.pdf
- https://static.usrfiles.com/ugd/24853a_f5d53973ac9b469f8c825b5f0dcf8b5b.pdf
- https://static.usrfiles.com/ugd/b8c837_9624d14830c74476a1917027b3de8b7f.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdf
- https://cdn.shopify.com/s/files/1/0434/6645/7254/files/12189204311.pdf
- https://cdn.shopify.com/s/files/1/0431/0840/1316/files/zapet.pdf
- https://cdn.shopify.com/s/files/1/0430/0043/0746/files/a_arte_da_prudencia_baltasar_gracian.pdf
- https://cdn.shopify.com/s/files/1/0428/9724/4316/files/dovixipanapazonatotibi.pdf
- https://static.usrfiles.com/ugd/0c41e7_06dbfe6cd20041a1abb1750dfc8a0687.pdf
- https://static.usrfiles.com/ugd/b8c837_c8177ee939264312bc87960bd83c0ff5.pdf
- https://static.usrfiles.com/ugd/de65f7_9555d4e9b23c4ab6ae3ec2c6946872bf.pdf
- https://static.usrfiles.com/ugd/99965f_6f22c7ae08fb44468b3da218de2e396b.pdf
- https://static.usrfiles.com/ugd/12dc78_0b779c0c2bce4c3d9ed745ed7f43bc25.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_off00006df7.bin` `780765920026904932d465ae9a6593f388496f938683c90a4c32c1e5337be3ac`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DF7	5188 bytes
`font_01_sfnt_off00007faa.bin` `c89714199b3d9d9ffc74237ad4f5936240d9e74e720ded1ea06fad3fdc46855f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7FAA	10896 bytes

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