PDF malware analysis — malicious · db43b570abdac016

MALICIOUS

PDF

34.9 KB Created: 2020-08-13 23:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 02665b953d8003ff1d054fd0ea81f50c SHA-1: e5b4a4331813f961a4bff9f185f86302f247b211 SHA-256: db43b570abdac016021d98068aa9958901a7f0ce53c611bf9f6d409adb9f83a4

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, pointing to 'https://ttraff.cc/pify?keyword=avg+vpn+on+android+box'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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=avg+vpn+on+android+box
- http://files.acstough.com/uploads/1/3/0/7/130775304/527d4828cf.pdf
- http://netinib.winebusinesssolutions.net/uploads/1/3/0/8/130814174/pojebeletopoda.pdf
- http://files.rrhsartclub.com/uploads/1/3/2/7/132740423/badekokidujura.pdf
- https://cdn.shopify.com/s/files/1/0433/2313/0009/files/28520659512.pdf
- https://cdn.shopify.com/s/files/1/0428/6346/0508/files/voxusuxorivasexit.pdf
- https://cdn.shopify.com/s/files/1/0429/2755/4723/files/masun.pdf
- https://cdn.shopify.com/s/files/1/0438/9352/2587/files/55306268887.pdf
- https://cdn.shopify.com/s/files/1/0454/5862/0574/files/bugamaduwozodalovedimu.pdf
- https://cdn.shopify.com/s/files/1/0429/7628/0729/files/talozomo.pdf
- https://cdn.shopify.com/s/files/1/0434/3431/1845/files/14413833813.pdf
- https://cdn.shopify.com/s/files/1/0432/4855/0050/files/88410641068.pdf
- https://cdn.shopify.com/s/files/1/0434/5489/0149/files/8927953603.pdf
- https://cdn.shopify.com/s/files/1/0431/8317/7885/files/64523705574.pdf
- https://cdn.shopify.com/s/files/1/0427/9658/1020/files/71546914953.pdf
- https://cdn.shopify.com/s/files/1/0435/3903/8360/files/78406088765.pdf
- https://cdn.shopify.com/s/files/1/0440/4235/4853/files/hipotiroidismo_en_el_embarazo.pdf
- https://cdn.shopify.com/s/files/1/0435/9972/4702/files/detodezeguwezax.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_off00004b80.bin` `07411dc9e98e479c27e376bb51e2037eeb467539c95a18559a5d3f3629829df9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4B80	5176 bytes
`font_01_sfnt_off00005d30.bin` `4cf181cb2f79b840e35485e34d8693e7f2d61a4a15baf213a5391d3a53532959`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D30	9800 bytes

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