PDF malware analysis — malicious · 63295613adaed611

MALICIOUS

PDF

41.9 KB Created: 2020-08-03 07:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 113c44eefe5fe98f6fcb3016de6121fc SHA-1: 03d836a431edbbc3ea268a3723d2852c4d5ee26f SHA-256: 63295613adaed61114fbdb6ae2bd360a7636bb615874ba146aefcd87fa7de501

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure users to malicious 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/pify?keyword=php+ajax+call
- http://files.akabetaphi.com/uploads/1/3/0/7/130740323/zalilij.pdf
- http://files.bullstonehouse.org/uploads/1/3/0/8/130814169/wurunixaxugugunemu.pdf
- http://files.inhomesalestrainer.com/uploads/1/3/1/1/131164424/logogijebis.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0431/5915/8946/files/delazibem.pdf
- https://cdn.shopify.com/s/files/1/0429/1405/4300/files/rokixo.pdf
- https://cdn.shopify.com/s/files/1/0437/1503/5288/files/tcp_ping_linux.pdf
- https://cdn.shopify.com/s/files/1/0431/5453/8656/files/vw_jetta_transmissions.pdf
- https://cdn.shopify.com/s/files/1/0428/6211/7020/files/steam_mac_download.pdf
- https://cdn.shopify.com/s/files/1/0445/3846/2372/files/ring_of_warmth_5e.pdf
- https://cdn.shopify.com/s/files/1/0431/3687/6695/files/51085563449.pdf
- https://cdn.shopify.com/s/files/1/0432/0300/2523/files/30316190511.pdf
- https://cdn.shopify.com/s/files/1/0433/6903/7982/files/79789252830.pdf
- https://cdn.shopify.com/s/files/1/0429/4243/1395/files/68424048582.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_off0000669f.bin` `5390ca2aa3f64085c2a46ecf42b2fd5f24e0165bfb60ce87bd56b39c9a78b345`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x669F	4892 bytes
`font_01_sfnt_off00007751.bin` `d8120518edcb43fe5a3eb306d2c96fe117fe0a3682972cd3ce9994ba2a46c305`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7751	10480 bytes

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