PDF malware analysis — malicious · 943f4a0dc2050f89

MALICIOUS

PDF

43.9 KB Created: 2020-09-01 01:29:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a4c56888eb147c58fc593764912aff71 SHA-1: b2c0aa8f2b0be4ab255929d62c1d651f94bc3291 SHA-256: 943f4a0dc2050f89288b86f565d4db02293a2a1f799f33e4a19be6567ee6570a

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a critical redirector link to https://ttraff.cc/wix?keyword=alchymista+pdf+ulozto, indicating a malicious redirection attempt. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent. No scripts were extracted, but the presence of a malicious redirector URL is sufficient evidence for a phishing or malware distribution attack pattern.

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/wix?keyword=alchymista+pdf+ulozto
- https://cdn.shopify.com/s/files/1/0433/3427/1126/files/87151139162.pdf
- https://cdn.shopify.com/s/files/1/0432/0677/0849/files/vezifu.pdf
- https://cdn.shopify.com/s/files/1/0430/6819/4978/files/job_application_letter_format_in_marathi.pdf
- https://cdn.shopify.com/s/files/1/0428/6968/6431/files/katepilodezoxenurivelolaw.pdf
- https://static.usrfiles.com/ugd/de60da_b0b79ec0afcc47febb67635c1c53212f.pdf
- https://static.usrfiles.com/ugd/b8c837_30f0b9498ab942609b3804b5a998672c.pdf
- https://static.usrfiles.com/ugd/b50c55_9509c2e7db3b49bea7fa963a5a180237.pdf
- https://static.usrfiles.com/ugd/f4de5e_45049416c49d40cbaaf81bbcefe35ccb.pdf
- https://static.usrfiles.com/ugd/df4650_da7bae4f1fe54d24ba473cf0a666c18e.pdf
- https://static.usrfiles.com/ugd/b50c55_a535a908a1bd4e3791632d033a4c48dc.pdf
- https://static.usrfiles.com/ugd/834936_8f5e3cb673af481cab8fb88e8632714f.pdf
- https://static.usrfiles.com/ugd/83d902_37894e7a5c384fca8943914662114b00.pdf
- https://static.usrfiles.com/ugd/3649d2_d0e26d8da1c14a8bae57b1fb6a7cf8e3.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
- https://cdn.shopify.com/s/files/1/0434/5564/3813/files/scac_code_list_2018.pdf
- https://cdn.shopify.com/s/files/1/0432/7673/0533/files/53735148547.pdf
- https://cdn.shopify.com/s/files/1/0432/5205/6227/files/lizuvewonuvesalewetaf.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_off00006d10.bin` `6d0dafa1f46a0894a3bfe474d70fc0af4291595d021103836bf37e551ae693fb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D10	5440 bytes
`font_01_sfnt_off00007f83.bin` `257cbbfe74fce53cc9b77bf7985324ff248f07575815c5b35a0f04dad3fb0668`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F83	10452 bytes

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