PDF malware analysis — malicious · 0dd84158817a25e1

MALICIOUS

PDF

45.0 KB Created: 2020-08-01 12:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b92c97d63dca7db6fa6d590b31c286e5 SHA-1: 0464728a8d1523e543135b3b128adc7c79230505 SHA-256: 0dd84158817a25e16b0ebf1f3e024aadbd02e3a3f839f4865516e38f1c41e8a1

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many pointing to Shopify-hosted PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link directs to a known malicious redirector, indicating a potential distribution point for further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=how+to+parse+a+string+in+c%252B%252B
- http://files.justaboutpetswc.ca/uploads/1/3/0/7/130775690/jobaxarivurerigusan.pdf
- http://files.singtamlee.com/uploads/1/3/1/3/131384605/kufowowowelojek_rijazeved_vaxamukula.pdf
- http://files.sarahcbenjamin.com/uploads/1/3/1/4/131437977/1653934.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0429/6422/2101/files/compress_mac.pdf
- https://cdn.shopify.com/s/files/1/0433/8201/4108/files/81046896615.pdf
- https://cdn.shopify.com/s/files/1/0433/8991/1194/files/49421104541.pdf
- https://cdn.shopify.com/s/files/1/0433/8050/6785/files/xapul.pdf
- https://cdn.shopify.com/s/files/1/0432/8452/9310/files/morufavufunevi.pdf
- https://cdn.shopify.com/s/files/1/0430/0141/3785/files/xigotukepolojufesunuv.pdf
- https://cdn.shopify.com/s/files/1/0432/4913/9880/files/xamaf.pdf
- https://cdn.shopify.com/s/files/1/0432/1466/7934/files/zirap.pdf
- https://cdn.shopify.com/s/files/1/0432/7941/7504/files/dumiromulu.pdf
- https://cdn.shopify.com/s/files/1/0431/6656/4503/files/toraxoraf.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_off000064d0.bin` `60275ba1767f7696a6dd724b9e827ef62780a790ca63f36924b4b5b8eb2055d2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64D0	5120 bytes
`font_01_sfnt_off0000765e.bin` `e7ea736e6808c4d7cb846f4bf88fefa8db7e641425cde5bf989c691a30e5276b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x765E	15420 bytes

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