PDF malware analysis — malicious · 70853294dba985e6

MALICIOUS

PDF

42.5 KB Created: 2020-09-10 09:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 31fec291b23759de353ddea2c974a7b0 SHA-1: 17a88c65a407e8563e60b0aa0909eaac26a08f60 SHA-256: 70853294dba985e62f685d416b8f2360e09d5d25601d8bceab6d1e9469aeb5fb

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, which is designed to lead users to harmful websites. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's part of a link farm designed for SEO manipulation to attract victims.

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/wix?keyword=victorville+case+information+online
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0432/7433/8454/files/72204909352.pdf
- https://cdn.shopify.com/s/files/1/0428/4363/5879/files/advanced_excel_basics.pdf
- https://cdn.shopify.com/s/files/1/0431/4267/6636/files/4772103508.pdf
- https://cdn.shopify.com/s/files/1/0432/8721/6293/files/ruzatigonapad.pdf
- https://cdn.shopify.com/s/files/1/0427/7967/2735/files/10792001579.pdf
- https://cdn.shopify.com/s/files/1/0461/8141/7114/files/gadinebopanedomumiki.pdf
- https://static.usrfiles.com/ugd/fdd6c2_fe2d34e9eaf646ff9d4b53d0ddb46b27.pdf
- https://static.usrfiles.com/ugd/fd30ac_38e94abc2c344ab6b6f6ff8ba8b675be.pdf
- https://cdn.shopify.com/s/files/1/0438/5017/0530/files/meteorology_textbook.pdf
- https://cdn.shopify.com/s/files/1/0430/1219/4457/files/doxitoredux.pdf
- https://cdn.shopify.com/s/files/1/0430/8100/7255/files/viva_la_bam_full_episodes.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_off00006834.bin` `56aa423e842a8b67dfd2c662370d097edae9f871d223f0c3120077fb9009a335`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6834	5052 bytes
`font_01_sfnt_off0000795c.bin` `040ab4525afadc3daabb8b3cc3c85c0bc53d811094ecf5f59138b20018f7eae7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x795C	10428 bytes

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