PDF malware analysis — malicious · 7b30c09393c1d87f

MALICIOUS

PDF

42.6 KB Created: 2020-09-03 08:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1f2f8f569e94ed53a2a4986ce00377ed SHA-1: 981299caa6ae22ea8045ccd241ec224a4a2d2148 SHA-256: 7b30c09393c1d87f62848f4ad6fffd57090d1ebad45fdbd9730538cae477afa8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains embedded links designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the URL https://ttraff.club/wix?keyword=building+maintenance+technology+pdf, which is likely intended to trick users into clicking it. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to increase visibility and click-through rates.

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.club/wix?keyword=building+maintenance+technology+pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/5ed537_e1eae282c0d443b2a33c8c541f441c48.pdf
- https://static.usrfiles.com/ugd/0d002d_fb7b0e83254f44ed98605cc1232c9b3f.pdf
- https://static.usrfiles.com/ugd/b8c837_c5770c939a3345329611b70808e26100.pdf
- https://static.usrfiles.com/ugd/0d002d_8bfd5ed22efd41ea8b5abbfc67e7801d.pdf
- https://cdn.shopify.com/s/files/1/0431/9900/4831/files/christmas_background_png_free.pdf
- https://cdn.shopify.com/s/files/1/0428/7735/4143/files/xuwugejimax.pdf
- https://cdn.shopify.com/s/files/1/0427/8353/9366/files/12862809694.pdf
- https://cdn.shopify.com/s/files/1/0429/2889/8211/files/double_bed_sheets_online_shopping_in_pakistan.pdf
- https://cdn.shopify.com/s/files/1/0429/2496/6044/files/tricky_app_questions_answers.pdf
- https://cdn.shopify.com/s/files/1/0434/4836/9319/files/26023061846.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_off000067c6.bin` `a31acc169f77c494623f2728deb493f785ec71447c87555dc55aa932b5d9ef66`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x67C6	5448 bytes
`font_01_sfnt_off00007a3e.bin` `0a05a0c61e0c4fc0a166d75c2dde561b7cc63f8d520547161fe2d6929c3376ee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7A3E	10400 bytes

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