PDF malware analysis — malicious · 63c8fb8445e2a799

MALICIOUS

PDF

51.1 KB Created: 2020-08-06 02:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9b9c39406b2c813b8fd21b6ad566b36a SHA-1: cbb17e2dba11fe18b8f353c330ac4045017356eb SHA-256: 63c8fb8445e2a7992c8cd2f4e69ae09c4c73ce142d42d3f1c0229245ac1219c1

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier 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=information+technology+roles+and+responsibilities+pdf
- http://tetamo.razfoto.com/uploads/1/3/1/4/131407227/7111828.pdf
- http://files.sbes365.org/uploads/1/3/0/7/130775912/refarenomaxarubobit.pdf
- http://gipuxal.trinity-anglicanchurch.org/uploads/1/3/0/8/130873826/zekudukofeb_jepegotusuxof_jomuju_kuwawazu.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0431/3815/4650/files/93951768536.pdf
- https://cdn.shopify.com/s/files/1/0431/8940/3810/files/nebezubogasogesoro.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65925238695.pdf
- https://cdn.shopify.com/s/files/1/0427/8488/2844/files/zuwuzaridobigamapu.pdf
- https://cdn.shopify.com/s/files/1/0434/4391/2856/files/country_code_65.pdf
- https://cdn.shopify.com/s/files/1/0435/5624/1557/files/gagatida.pdf
- https://cdn.shopify.com/s/files/1/0438/0504/8994/files/ralelo.pdf
- https://cdn.shopify.com/s/files/1/0434/1301/2636/files/50173788406.pdf
- https://cdn.shopify.com/s/files/1/0437/8905/8206/files/54417293838.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_off000086a5.bin` `9ce2428a5d2c51748791772ff7f7e85dc3430edcdf11f1f5589aeee617881260`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86A5	5748 bytes
`font_01_sfnt_off00009a0c.bin` `46a7fdf00b997ded7a2e2581b982ae282ea1c3ffecc8822e27ec028208711a17`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9A0C	10904 bytes

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