PDF malware analysis — malicious · c9aca45f445dcc3a

MALICIOUS

PDF

41.2 KB Created: 2020-08-03 01:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ec6fca06a6e71ea5553ec2d388bf495a SHA-1: 946dad468b254b152a0721b828766286b2ec8854 SHA-256: c9aca45f445dcc3a410956a02da6b7f6d6db87c56373ed130d151ee171c4e86c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous PDF files hosted on Shopify and other domains, with one URL identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and references to other PDF files. This suggests a campaign to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

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=icyveins+unholy+dk
- http://files.practicalautomation.com/uploads/1/3/0/7/130776393/1928632.pdf
- http://files.melissashowers.com/uploads/1/3/2/7/132740399/1333731.pdf
- http://files.donedberg.com/uploads/1/3/1/4/131408117/2190513.pdf
- https://cdn.shopify.com/s/files/1/0431/7016/8986/files/67098946379.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69651331918.pdf
- https://cdn.shopify.com/s/files/1/0435/6997/1363/files/32272500679.pdf
- https://cdn.shopify.com/s/files/1/0436/3796/4960/files/35874989418.pdf
- https://cdn.shopify.com/s/files/1/0433/1926/3397/files/54244805493.pdf
- https://cdn.shopify.com/s/files/1/0435/2894/5815/files/37391757435.pdf
- https://cdn.shopify.com/s/files/1/0428/2214/0063/files/33238264978.pdf
- https://cdn.shopify.com/s/files/1/0438/9024/5787/files/petodalak.pdf
- https://cdn.shopify.com/s/files/1/0431/7623/1063/files/12112919539.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
- https://cdn.shopify.com/s/files/1/0430/6475/4325/files/wolujitefudowuresa.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_off00006597.bin` `e03adf340777596c0a70b86811031a463f134f4ed99918adecb48f589df7115b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6597	4884 bytes
`font_01_sfnt_off00007644.bin` `eec2868850e5f5dac71ec9f695c8536c028114e973f36446755632255e5236d2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7644	9964 bytes

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