PDF malware analysis — malicious · 037472b105327ea1

MALICIOUS

PDF

41.6 KB Created: 2020-08-16 12:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a995a11231ef5debe32fa131e3ac7660 SHA-1: 82517de3754a6554364b135c61c8a101620a0204 SHA-256: 037472b105327ea1a8a9f346c6f1e4635f7f60f8476453e7ec0523cc3afe5199

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/wb?keyword=modulators%20and%20demodulators%20pdf
- http://files.martialhartamas.com/uploads/1/3/0/8/130814279/6186ec0be38b.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0432/7899/1520/files/tonakigiwafidupogagimod.pdf
- https://cdn.shopify.com/s/files/1/0431/6990/6854/files/ralariwamujela.pdf
- https://cdn.shopify.com/s/files/1/0430/1520/9123/files/prayer_beads_sekiro.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19194700937.pdf
- https://cdn.shopify.com/s/files/1/0429/6730/2303/files/august_month_current_affairs_2020_gradeup.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62856854762.pdf
- https://cdn.shopify.com/s/files/1/0437/7139/6257/files/barodezodeb.pdf
- https://cdn.shopify.com/s/files/1/0431/6240/2967/files/97589489137.pdf
- https://cdn.shopify.com/s/files/1/0428/9714/6019/files/sokema.pdf
- https://cdn.shopify.com/s/files/1/0435/8481/5259/files/boruzexidelidapekavo.pdf
- https://cdn.shopify.com/s/files/1/0431/7344/5792/files/wenowizexijebisoxuke.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_off00005711.bin` `5ab65e7aae9288cf4abbeea0a7e9924ff516b4a015bb9dc2d6b96007a0a1c6c6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5711	5192 bytes
`font_01_sfnt_off000068aa.bin` `455f3bbb2a666d547d4766026005fde749a9910a1bb79c834f1d2c37433dab30`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x68AA	15200 bytes

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