PDF malware analysis — malicious · 75a78861540fc62e

MALICIOUS

PDF

42.5 KB Created: 2020-09-08 12:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 540416bb13472f70acfedab9c1416778 SHA-1: 9769cd53fa3a61f565248ac561bb82f8b533df9e SHA-256: 75a78861540fc62e5f31c7de2790c05887f3390eab44478dadbd8b920bfe2a84

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further indicates suspicious activity. The document body, though heavily obfuscated, contains the primary malicious URL.

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.me/pify?keyword=real+cb+hair+editing+app
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static.usrfiles.com/ugd/bc79a4_902c16f1cdac46bb88eda8a87c09b236.pdf
- https://static.usrfiles.com/ugd/808d8c_141d051d77d44f57842e1fdb664f20c3.pdf
- https://static.usrfiles.com/ugd/3794ad_561df32d08c34d4882797d611368ec79.pdf
- https://cdn.shopify.com/s/files/1/0437/9626/7168/files/18839318296.pdf
- https://cdn.shopify.com/s/files/1/0431/1708/4833/files/80513885880.pdf
- https://cdn.shopify.com/s/files/1/0432/3203/4980/files/gevobo.pdf
- https://cdn.shopify.com/s/files/1/0434/6478/6086/files/astm_a105_specification.pdf
- https://cdn.shopify.com/s/files/1/0433/0032/3478/files/bcc_email_full_form.pdf
- https://static.usrfiles.com/ugd/e3ed1f_0d00a2666b434f97b6178b02934d329c.pdf
- https://static.usrfiles.com/ugd/54bec1_afa4bb5cb197427db3a91cfe3bb4dca6.pdf
- https://static.usrfiles.com/ugd/ca32a8_92b60cd57cd74450bca939b2a66df1ae.pdf
- https://static.usrfiles.com/ugd/b8c837_428cec0b543d4fd7a34cd88414831e33.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_off00006967.bin` `f651cb015ff1a7a311e8431a4c5ad90d20ad516b6180718a1001102b7f1f5dcc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6967	5304 bytes
`font_01_sfnt_off00007b62.bin` `638fb415397fe4a1aea18fd851dd695b96171bc8d45e5d5170d368760794dcd0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B62	10004 bytes

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