Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf63c62c3b4eb8e0…

MALICIOUS

PDF

50.6 KB Created: 2020-08-07 22:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0341c943c7d17fa57f81c7f0b1d76722 SHA-1: 48e455d95d92629ca11d74393eda59ba65cf8c51 SHA-256: cf63c62c3b4eb8e0f4a7dd8916b2109cae0500ccc2bd417962f01d0bbbbefd95
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to improve search engine ranking for malicious content. One of the primary links, 'https://ttraff.ru/pify?keyword=riptide+ukulele+chords+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the target URL and the lure of ukulele chords, suggesting a social engineering attempt to drive traffic to the malicious site.

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=riptide+ukulele+chords+pdf
    • http://files.mirelajoja.com/uploads/1/3/0/7/130776262/311620.pdf
    • http://files.polymerall.shop/uploads/1/3/1/8/131858592/zibutexepitokev.pdf
    • http://duperu.katemcculloughwaterart.com/uploads/1/3/1/6/131636725/14a5f81e8fe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bewewolifokolugetu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/monogekabixelejilenoga.pdf
    • https://cdn.shopify.com/s/files/1/0437/3187/8049/files/boneguzekaxudisul.pdf
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/western_australia_road_map.pdf
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/xonolitibagawipa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/rutherford_county_jail_app.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0056/files/lojadipofoxegula.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/80486740522.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/55886722281.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/26661778301.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/wivetizaziw.pdf
    • https://cdn.shopify.com/s/files/1/0428/7938/5766/files/91321440109.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/dual_boot_windows_10_and_ubuntu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006867.bin
708a05291e8719c5ba17284c090658395af394ce8e243d0f1320337ddb12e90b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6867 5104 bytes
font_01_sfnt_off000079c7.bin
e8f4bf9f660dc37dddc86ac4df71f0b82f93b1781833b5b05fd6b0da0932a987
pdf-font-stream PDF embedded font (sfnt) at offset 0x79C7 14728 bytes
font_02_sfnt_off0000a807.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA807 16204 bytes