PDF malware analysis — malicious · 1d8ba2544f8cafe0

MALICIOUS

PDF

63.0 KB Created: 2020-08-06 08:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: afb9c7606e8075487b82be82b3b0a8f6 SHA-1: cecf50108c0240597b3e115158ad66cfb4b4936c SHA-256: 1d8ba2544f8cafe00ca6dc9962c860270221b6d79f7e1dc45b2171c375893020

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=lexical+analysis+linguistics+pdf'. Additionally, it exhibits a PDF link farm heuristic, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of the malicious URL and the link farm structure strongly suggest a phishing or malware distribution attempt.

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=lexical+analysis+linguistics+pdf
- http://files.ericamaesincee.com/uploads/1/3/1/0/131070011/8634862.pdf
- http://files.ironbreedlemc.org/uploads/1/3/1/3/131382092/1892704.pdf
- http://files.dreampathwayskids.org/uploads/1/3/0/7/130740563/1422338.pdf
- https://cdn.shopify.com/s/files/1/0428/2672/7580/files/65301643138.pdf
- https://cdn.shopify.com/s/files/1/0432/0352/6820/files/xoxuduwamutupu.pdf
- https://cdn.shopify.com/s/files/1/0431/7007/0690/files/degodobadigev.pdf
- https://cdn.shopify.com/s/files/1/0440/0916/0862/files/42077002883.pdf
- https://cdn.shopify.com/s/files/1/0433/9689/0785/files/holes_anatomy_and_physiology_11th_edition.pdf
- https://cdn.shopify.com/s/files/1/0433/1054/7099/files/depuwafeki.pdf
- https://cdn.shopify.com/s/files/1/0434/7035/6637/files/sawed.pdf
- https://cdn.shopify.com/s/files/1/0430/0151/2090/files/88492308473.pdf
- https://cdn.shopify.com/s/files/1/0429/3197/8403/files/4544737459.pdf
- https://cdn.shopify.com/s/files/1/0430/8038/4674/files/rabizuvawena.pdf
- https://cdn.shopify.com/s/files/1/0439/0119/0299/files/64080014203.pdf
- https://cdn.shopify.com/s/files/1/0432/3839/1970/files/67185417705.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_off0000aca6.bin` `8e37507102e93792551e96bf4599cdd575096020c8252a01bc0956083fbea8cf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xACA6	5112 bytes
`font_01_sfnt_off0000be2a.bin` `32e244b622cb0406a9e3f58cb737a743e3350df631b8d3171c6ce84dcfe9bd9a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE2A	10120 bytes
`font_02_sfnt_off0000e0cc.bin` `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0CC	4324 bytes

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