PDF malware analysis — malicious · 4373721a5ec5095a

MALICIOUS

PDF

40.7 KB Created: 2020-08-20 12:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 76dff646fb4a6653492a2bc628c36467 SHA-1: 21d3d4967fa664864d772ce5a4155d7241dd5cb6 SHA-256: 4373721a5ec5095ae5b614ae621e0941449b29521a6dffd16296dd4c439abcd3

120 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains a large number of embedded links, many pointing to what appears to be a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=finding+grammar+errors+worksheets'. The document body, though heavily obfuscated, contains text related to 'finding grammar errors worksheets' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The presence of numerous PDF links and a malicious redirector indicates a likely phishing or malware distribution attempt.

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=finding+grammar+errors+worksheets
- http://files.buildingmentalhealth.net/uploads/1/3/0/9/130969700/lelavofedoniniguzo.pdf
- http://files.southernwildproducts.com/uploads/1/3/0/8/130814594/pupewas.pdf
- http://ziwekoxo.fleurdelizcandles.com/uploads/1/3/0/7/130738615/e31d6dfebfa87d.pdf
- http://files.theconferencereview.com/uploads/1/3/0/7/130775712/115918.pdf
- http://vafono.xaviersuarez.net/uploads/1/3/1/3/131384635/49539d.pdf
- https://cdn.shopify.com/s/files/1/0431/6856/3355/files/milton_parks_and_rec_guide.pdf
- https://cdn.shopify.com/s/files/1/0432/7797/5717/files/kaththi_movie_moviesda.pdf
- https://cdn.shopify.com/s/files/1/0432/7296/2203/files/suniwajibe.pdf
- https://cdn.shopify.com/s/files/1/0433/1762/4990/files/zunut.pdf
- https://cdn.shopify.com/s/files/1/0461/7548/6115/files/kupameluwi.pdf
- https://cdn.shopify.com/s/files/1/0430/0269/1743/files/ansiedad_social_definicion.pdf
- https://cdn.shopify.com/s/files/1/0433/7329/7814/files/bendito_jesus_letra.pdf
- https://cdn.shopify.com/s/files/1/0431/5525/9546/files/55743138371.pdf
- https://cdn.shopify.com/s/files/1/0437/9652/9314/files/jipavopojaxedapodovibeno.pdf
- https://cdn.shopify.com/s/files/1/0436/5726/5305/files/32329907204.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_off00006145.bin` `c6454c4374d71d6f80be51ecd65ff4f45c797b124299c444aa070ce9071bcb25`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6145	5316 bytes
`font_01_sfnt_off0000733f.bin` `798fb731655a57a0b42461ed78a2dacd118d9bbeedbde8bc1e9087306a53c0b3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x733F	10176 bytes

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