PDF malware analysis — malicious · c8e70431977f7830

MALICIOUS

PDF

54.7 KB Created: 2020-08-17 06:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cb2bcfc79d547730297344e6084a5790 SHA-1: 970479a27a4cf063039834b231f52ac86e75da0e SHA-256: c8e70431977f783028245c45f08a84ab76ee00b62a75ac2b0f38c6fa8fd6c099

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous embedded links, a common tactic for SEO link farms and phishing. One prominent link, 'https://ttraff.com/pify?keyword=dashboard+template+excel+2013', is identified as a malicious redirector. The document body, though partially corrupted, also contains this URL and references to 'dashboard template excel 2013', suggesting a lure to trick users into clicking the malicious link. 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.com/pify?keyword=dashboard+template+excel+2013
- http://files.bscscomputing.com/uploads/1/3/2/6/132682686/5705f7fe033271.pdf
- https://cdn.shopify.com/s/files/1/0440/3917/6357/files/minecraft_fish_farm.pdf
- https://cdn.shopify.com/s/files/1/0435/2563/6248/files/25909362023.pdf
- https://cdn.shopify.com/s/files/1/0430/7753/3856/files/vuwimatugexonut.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
- https://cdn.shopify.com/s/files/1/0449/2450/2171/files/30086069719.pdf
- https://cdn.shopify.com/s/files/1/0429/8450/5498/files/85187057708.pdf
- https://cdn.shopify.com/s/files/1/0434/0200/2595/files/vodisesaliwilamaxodufo.pdf
- https://cdn.shopify.com/s/files/1/0430/4253/7629/files/18717746283.pdf
- https://cdn.shopify.com/s/files/1/0438/9077/0088/files/43767574866.pdf
- https://cdn.shopify.com/s/files/1/0431/6836/6760/files/rokomanelizinifo.pdf
- https://cdn.shopify.com/s/files/1/0428/0467/4727/files/36150486242.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_off00009737.bin` `45c2483ef70d5e0ebb72edef4a049e90b26d9a0b0264786c18b5949be41f0e3d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9737	6008 bytes
`font_01_sfnt_off0000ab89.bin` `4f815f9b98d5b6e78933b1e9f0526e1f0f490560320c2f4ca954169f1c9df014`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAB89	10192 bytes

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