PDF malware analysis — malicious · b31164737a2cea40

MALICIOUS

PDF

39.9 KB Created: 2020-08-11 03:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 02bfcb148655aadc8caded0a3ea262d9 SHA-1: 8f7a6af3eabc06bfdb15632b9573cec6863bb066 SHA-256: b31164737a2cea4011b53caebc0cebfe625d3efbcbd7381c3c74322045dfc28f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests a phishing attempt to lure users to a compromised site under the guise of providing an accounting standard document. No scripts were extracted, and the family is unknown due to the lack of specific indicators.

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/pify?keyword=international+accounting+standard+38+pdf
- http://files.stjosephsballymun.com/uploads/1/3/1/4/131437660/kebowos.pdf
- http://files.dyband.org/uploads/1/3/1/3/131383318/wevapabanepedogevudi.pdf
- http://files.theamericanmatrix.com/uploads/1/3/1/3/131398140/3374439.pdf
- https://cdn.shopify
- https://cdn.shopify.com/s/files/1/0431/6410/6901/files/61136909767.pdf
- https://cdn.shopify.com/s/files/1/0438/4600/8982/files/convert_indd_to_online.pdf
- https://cdn.shopify.com/s/files/1/0434/8765/8141/files/95269226452.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tutokufumetuja.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3215656586.pdf
- https://cdn.shopify.com/s/files/1/0429/9915/2799/files/lafusazetamusufimufixop.pdf
- https://cdn.shopify.com/s/files/1/0429/2273/7830/files/budekedilubifegowugiv.pdf
- https://cdn.shopify.com/s/files/1/0434/7448/5401/files/dmv_accident_report_form.pdf
- https://cdn.shopify.com/s/files/1/0431/2717/7380/files/agco_parts_books.pdf
- https://cdn.shopify.com/s/files/1/0430/7792/7072/files/61170209935.pdf
- https://cdn.shopify.com/s/files/1/0440/6044/2774/files/zaxijigirerupepefiku.pdf
- https://cdn.shopify.com/s/files/1/0428/9187/0375/files/31121214131.pdf
- https://cdn.shopify.com/s/files/1/0434/0200/2595/files/emerald_tablets_hermes.pdf
- https://cdn.shopify.com/s/files/1/0440/5110/3894/files/lajogejumulozomevob.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_off00005d4e.bin` `5a37ac18e3ddd8d3616f3a4a38ab16e7e3142fc4f47b2edce2626f7a121724af`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D4E	5616 bytes
`font_01_sfnt_off00007070.bin` `52f13c12a8d8f184335b47adecbd4a88fda6b494b8f6518e3ae6568520da01ba`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7070	9772 bytes

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