PDF malware analysis — malicious · 9b52cbd3e35fc1de

MALICIOUS

PDF

45.8 KB Created: 2020-09-01 08:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: be8ca59cafa32d34ac8cbffdb3667c77 SHA-1: dd64811d47680a344e963293776e58d08745b738 SHA-256: 9b52cbd3e35fc1def48f3db939e5c8bbfaf5efefa47d60696d4adfe54d10e00c

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, designed to manipulate search engine results. One of these links, https://ttraff.ru/wix?keyword=dandelion+plant+information, is identified as a malicious redirector. The document body is heavily obfuscated but contains references to the malicious URL and benign-looking PDF filenames, suggesting a lure to drive traffic to malicious infrastructure.

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.ru/wix?keyword=dandelion+plant+information
- https://cdn.shopify.com/s/files/1/0437/4695/1319/files/kinemaster_video_editing_templates.pdf
- https://cdn.shopify.com/s/files/1/0433/6451/6005/files/apples_and_bananas_education_answers.pdf
- https://cdn.shopify.com/s/files/1/0431/6830/1212/files/nalirode.pdf
- https://cdn.shopify.com/s/files/1/0432/3183/8368/files/vizio_code_for_directv.pdf
- https://cdn.shopify.com/s/files/1/0428/1591/4151/files/catarina_e_os_outros_sub_indo.pdf
- https://cdn.shopify.com/s/files/1/0430/6596/6741/files/towevekalidusodi.pdf
- https://cdn.shopify.com/s/files/1/0429/1795/3702/files/musculos_de_la_respiracion.pdf
- https://static.usrfiles.com/ugd/15cd4d_2d883faac7774ff4abd881bb0c9e6874.pdf
- https://static.usrfiles.com/ugd/b8c837_a182443aa60d49d9aceba2fbf9fcfffd.pdf
- https://static.usrfiles.com/ugd/51c472_3df12ee272b94f37b3a336ad8ed7be25.pdf
- https://static.usrfiles.com/ugd/07ef24_28264fea3dfb4f659adf375d8ae77a62.pdf
- https://static.usrfiles.com/ugd/12745a_41282bf3951543a2ab8ff70ac31fedfb.pdf
- https://cdn.shopify.com/s/files/1/0430/3847/4397/files/autoestima_definicion_psicologia.pdf
- https://cdn.shopify.com/s/files/1/0437/0432/0154/files/kapununo.pdf
- https://cdn.shopify.com/s/files/1/0433/4229/9295/files/55478627055.pdf
- https://cdn.shopify.com/s/files/1/0434/2788/9302/files/kajizezenozelif.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_off000076b2.bin` `1e207d1d1ddcdd5b14bef89206ac4d34d80887d622ae9a18fda6ea345538f684`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x76B2	5008 bytes
`font_01_sfnt_off000087ac.bin` `35d0e7f616adb1ac777a1b55bc57f0182f53a464c139c0eeb574651adc5c77d4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87AC	10384 bytes

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