PDF malware analysis — malicious · 6a2412667675ab35

MALICIOUS

PDF

48.2 KB Created: 2020-08-01 11:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5e94cbf58b149d5337a4df50d5c7db6a SHA-1: 3cc10b365edd25a54ccf26d143c1ce3e19f8ee9d SHA-256: 6a2412667675ab352bd1357a98fe6c9363e662f2ad198596d275350f9344e2ad

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link that leads to a large collection of other PDFs, likely intended to distribute malware or phish for credentials. The ML classifier strongly indicated maliciousness, and the PDF structure itself points to a link farm designed for malicious redirection. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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=i2c+scanner+arduino
- http://files.literaryhumboldt.org/uploads/1/3/0/8/130873781/6c135d9.pdf
- http://files.paranormalworldofgsreynolds.com/uploads/1/3/0/7/130776726/5c88f6471d.pdf
- http://files.alyssavegerphotography.com/uploads/1/3/1/4/131437421/durawazulozo.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0432/2571/0750/files/karosenowavoteboroderedi.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53981477141.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.pdf
- https://cdn.shopify.com/s/files/1/0430/3421/4561/files/lofomalonubadizisusevasum.pdf
- https://cdn.shopify.com/s/files/1/0431/4149/6981/files/nagejenuwevelarelasiwo.pdf
- https://cdn.shopify.com/s/files/1/0428/5415/4406/files/xejudiwodot.pdf
- https://cdn.shopify.com/s/files/1/0434/4266/7676/files/81184569667.pdf
- https://cdn.shopify.com/s/files/1/0428/2561/3475/files/26445165203.pdf
- https://cdn.shopify.com/s/files/1/0429/9679/3503/files/xedakomanasize.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_off000070bb.bin` `7a048d3bb47293e5ae78a034a8292286e284ad9862637eccf2e9eded8f1294c9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x70BB	4972 bytes
`font_01_sfnt_off000081af.bin` `092e3a500072f4fccace318891a1b63b72b93d23f5e955172c2f17b4e56c8a86`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81AF	15480 bytes

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