PDF malware analysis — malicious · 57d70d0e53c91fc0

MALICIOUS

PDF

48.1 KB Created: 2020-08-20 01:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a36d8712ba2629e7b6f73b82c2dee99c SHA-1: 2e428ca64ab5eec53bcd4b0f4a83229d2a890152 SHA-256: 57d70d0e53c91fc07f02e2c3a7dc7037959b7326c4d611d2c6b53a3da6bf14c6

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=distressor+uad+manual'. This indicates an attempt to direct users to malicious infrastructure. Additionally, a PDF link farm heuristic was triggered, suggesting the document is part of a larger effort to distribute links. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious redirector URL is sufficient to infer a phishing or redirection attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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=distressor+uad+manual
- http://files.marinaredlich.com/uploads/1/3/0/9/130969598/fc2135835.pdf
- http://files.sarahwlaiola.com/uploads/1/3/0/8/130815213/b3016ffc924.pdf
- https://cdn.shopify.com/s/files/1/0431/6725/2641/files/29586397440.pdf
- https://cdn.shopify.com/s/files/1/0430/6314/8706/files/neural_networks_and_deep_learning.pdf
- https://cdn.shopify.com/s/files/1/0431/0761/4882/files/73149038321.pdf
- https://cdn.shopify.com/s/files/1/0436/5923/1385/files/mindray_pm_60_pulse_oximeter.pdf
- https://cdn.shopify.com/s/files/1/0432/1171/8820/files/83455253933.pdf
- https://cdn.shopify.com/s/files/1/0434/0364/0999/files/53103140461.pdf
- https://cdn.shopify.com/s/files/1/0433/5170/3706/files/vajowimejiwakikujapewonew.pdf
- https://cdn.shopify.com/s/files/1/0429/5114/7679/files/megitonagorukutumogikar.pdf
- https://cdn.shopify.com/s/files/1/0431/8589/7627/files/38154887778.pdf
- https://cdn.shopify.com/s/files/1/0434/1992/6679/files/french_to_english_sentences.pdf
- https://cdn.shopify.com/s/files/1/0428/6886/7231/files/athlean_xero_download.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006858.bin` `be3bd9bf388564d157501113b5611b6b038f5c30ae59f7051c80f8994f3eff20`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6858	4852 bytes
`font_01_sfnt_off000078b6.bin` `13f7ac137474c3443d93656261f5f310c2c9df22016bca1e6b950b120608af98`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x78B6	14240 bytes
`font_02_sfnt_off0000a52f.bin` `1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA52F	4324 bytes

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