PDF malware analysis — malicious · 688161d76764f70e

MALICIOUS

PDF

39.7 KB Created: 2020-08-28 05:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 46c10df9a08577ff88fecf09bec6c14a SHA-1: c2a285d285c10b4423efe178b63490b04b2e2bd0 SHA-256: 688161d76764f70eb7946cd87bd073b774df5b6e03e8150cb5c9dbd13bc612e0

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though partially obfuscated, includes text related to research project limitations and a URL that appears to be part of a link farm. The presence of numerous external links, including one to a malicious redirector, strongly suggests an attempt to lead users to harmful 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.link/pify?keyword=limitaciones+de+un+proyecto+de+investigacion
- http://wovom.jeannekipke.com/uploads/1/3/0/8/130874104/4479229.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0434/8936/2082/files/29571495026.pdf
- https://cdn.shopify.com/s/files/1/0433/5511/1589/files/lewunepoduzinapobuwamo.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
- https://cdn.shopify.com/s/files/1/0432/3491/8558/files/bomelaguzis.pdf
- https://cdn.shopify.com/s/files/1/0432/8390/6724/files/vuwiroxinaxobidezoragilox.pdf
- https://cdn.shopify.com/s/files/1/0430/7727/1713/files/urticaria_cronica.pdf
- https://cdn.shopify.com/s/files/1/0432/3016/7202/files/roretow.pdf
- https://cdn.shopify.com/s/files/1/0432/8462/7616/files/54980629105.pdf
- https://cdn.shopify.com/s/files/1/0434/9932/3558/files/natojitaxepov.pdf
- https://cdn.shopify.com/s/files/1/0448/4136/9761/files/adobe_acrobat_trial_free.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_off00005c69.bin` `83083ac55bdffa1922fb0a1c3c16b23378c117548ac79da3f63168da5f93c7dd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5C69	5464 bytes
`font_01_sfnt_off00006eeb.bin` `2b4c4732bcc096529bbe6d0495e1d38bfcf69613fa80f80774b0d65eb27b39e2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6EEB	10840 bytes

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