PDF malware analysis — malicious · 8e7afd863d6bcf20

MALICIOUS

PDF

40.0 KB Created: 2020-08-20 06:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0e07c2140f96101e449f98c9e10035ea SHA-1: 30331b21e10f299491357e3e0e841e536dbc8278 SHA-256: 8e7afd863d6bcf2011360042d8c6d6d6884da03fc41d155c11288c3b6d4f9e5d

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=cnis+cadastro+nacional+de+informa%25C3%25A7%25C3%25B5es+sociais+dataprev'. This indicates a phishing or social engineering attempt to redirect the user to a malicious site. The document body also contains this URL and numerous other PDF links, consistent with a link farm or SEO poisoning tactic, further supporting the malicious intent.

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.ru/pify?keyword=cnis+cadastro+nacional+de+informa%25C3%25A7%25C3%25B5es+sociais+dataprev
- http://files.redroomyoga.com/uploads/1/3/2/8/132814306/bekijoka.pdf
- http://files.esolwithus.com/uploads/1/3/0/8/130813961/suxaxajomoduladudo.pdf
- https://cdn.shopify.com/s/files/1/0439/9936/3222/files/kiwemajigogosesogiz.pdf
- https://cdn.shopify.com/s/files/1/0435/2750/4024/files/13132773261.pdf
- https://cdn.shopify.com/s/files/1/0432/6647/4139/files/wimad.pdf
- https://cdn.shopify.com/s/files/1/0431/3029/0327/files/76583608340.pdf
- https://cdn.shopify.com/s/files/1/0461/7836/9699/files/15346605059.pdf
- https://cdn.shopify.com/s/files/1/0464/5791/3512/files/lobajig.pdf
- https://cdn.shopify.com/s/files/1/0436/6244/2646/files/11112038150.pdf
- https://cdn.shopify.com/s/files/1/0429/2050/9596/files/79375201504.pdf
- https://cdn.shopify.com/s/files/1/0432/6454/0835/files/punufidijojikara.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32296476761.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000590a.bin` `51a91fdd1b21fc55fd4cf32a503843ddabb8f06c736e622daab6f204284663bc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x590A	5664 bytes
`font_01_sfnt_off00006bad.bin` `5831b80d47dc7d5ef6dbdb090395613fd92c457619766bbc491b6cedb2742d8b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6BAD	12120 bytes

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