PDF malware analysis — malicious · 78b7bd0dae541fc1

MALICIOUS

PDF

49.5 KB Created: 2020-09-01 02:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9a1471fc1e8c5e295070f8f6c62810b7 SHA-1: 9c20babb4ce8251912dc69711445f47a240f38a5 SHA-256: 78b7bd0dae541fc1b55a8318daaf8fb6a2deb7545a65857cbe412fdd7c16ffdf

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'free music android phone' and the URL itself, suggesting a phishing or scam attempt. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting the malicious intent.

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=free+music+android+phone
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0434/9735/7472/files/youtube_to_mp4_unblocked.pdf
- https://cdn.shopify.com/s/files/1/0432/7204/4697/files/barratt_impulsiveness_scale.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.pdf
- https://cdn.shopify.com/s/files/1/0435/9569/4239/files/championship_manager_2018_mod_apk.pdf
- https://static.usrfiles.com/ugd/b8c837_07d0c78823af452eb49be98f48523b22.pdf
- https://static.usrfiles.com/ugd/fb83f1_2016a7e206a643dca4475ce2cc9c67a6.pdf
- https://static.usrfiles.com/ugd/cdb50c_fdbf0c0a24784148b19db976c77cc057.pdf
- https://static.usrfiles.com/ugd/585b1d_7b7a3d5a18f1488b8a19a81a260ad2ca.pdf
- https://static.usrfiles.com/ugd/1ee69b_4bca1fe2ef1e4aed979440be64cd438e.pdf
- https://static.usrfiles.com/ugd/a76634_1c3515557134458f81327d53a26f02b2.pdf
- https://static.usrfiles.com/ugd/b8c837_0966f76519d5435fb58d3384d9b6cfcb.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_off000083f1.bin` `2891fbbe5c52fd6bef69e599617072601f22473b850046a123a6a26a49546f05`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83F1	5236 bytes
`font_01_sfnt_off00009593.bin` `99f10379af5eb7e4098d631f07b6bf35c72874caf6cd1693ce72662d60e05f7e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9593	10388 bytes

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