PDF malware analysis — malicious · a6425008bf9baa6b

MALICIOUS

PDF

40.6 KB Created: 2020-08-14 00:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bfa4fd43c2f0b61db7edab32fac5a377 SHA-1: 49a771765fb0f688e20905874b2e72b784e7a4c4 SHA-256: a6425008bf9baa6bb3b0d62f748454ece79bc186d41ad95b87e95cf786a6375e

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.com/wb?keyword=plato%20del%20bien%20comer%20pdf%20para%20colorear. The document body, though heavily obfuscated, also contains this URL, reinforcing the lure. The ML classifier strongly supports the malicious verdict.

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.com/wb?keyword=plato%20del%20bien%20comer%20pdf%20para%20colorear
- http://files.nmoc.co.uk/uploads/1/3/1/3/131383727/vaxemomurewipi.pdf
- http://files.joanbennettcelebrant.com/uploads/1/3/0/8/130813913/firex-keteg-mubesari-nixazaz.pdf
- http://gilovogi.pdsummit.ca/uploads/1/3/0/8/130814328/zusovagoxomumof.pdf
- http://files.zincrooster.com/uploads/1/3/1/4/131437253/8833628.pdf
- https://cdn.shopify.com/s/files/1/0438/6563/7019/files/fletching_calc_rs3.pdf
- https://cdn.shopify.com/s/files/1/0428/0962/2691/files/astm_a53_grade_b.pdf
- https://cdn.shopify.com/s/files/1/0428/2312/3100/files/zogota.pdf
- https://cdn.shopify.com/s/files/1/0431/4228/3432/files/besexolapobidoroxerul.pdf
- https://cdn.shopify.com/s/files/1/0429/3407/5558/files/agglutination_reaction.pdf
- https://cdn.shopify.com/s/files/1/0433/4338/0631/files/macos_sierra_app.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdf
- https://cdn.shopify.com/s/files/1/0430/3316/5986/files/73893294489.pdf
- https://cdn.shopify.com/s/files/1/0433/9014/0583/files/attendance_register_template.pdf
- https://cdn.shopify.com/s/files/1/0432/4563/3693/files/aplasia_medular_severa.pdf
- https://cdn.shopify.com/s/files/1/0435/0600/8216/files/fofemekosumel.pdf
- https://cdn.shopify.com/s/files/1/0431/1321/8199/files/99511399406.pdf
- https://cdn.shopify.com/s/files/1/0433/4767/3253/files/jugosugexagazamilagikos.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_off0000623d.bin` `aff49c57e8c22870008c42492d99de01da9a3152117d3b688698698a8329fdb3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x623D	5264 bytes
`font_01_sfnt_off00007402.bin` `32c884fe5465d2dfde9b8d14b2ca99ea13072475381c986649a598a0edb2cc8f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7402	10316 bytes

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