Malicious PDF — malware analysis report

Static analysis result for SHA-256 2473f66cc347ecdf…

MALICIOUS

PDF

46.3 KB Created: 2020-08-28 11:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78d467bb93fd895d6a704b43d851cd32 SHA-1: 3614a8f2ae6037d0385c232f772a4532f79f385d SHA-256: 2473f66cc347ecdfbc86628217dc647606d108e68121af16fc5cdbcc235cec9e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to create link farms for SEO poisoning or to direct users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=windows+7+longbow+2'. The document body, though heavily obfuscated, contains this URL and other PDF links, reinforcing the attack pattern. No scripts were extracted, but the primary mechanism appears to be directing users to malicious infrastructure via embedded links.

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=windows+7+longbow+2
    • http://kiwarob.purebreathworks.com/uploads/1/3/0/9/130969959/bevugok-zerizev-zamejo.pdf
    • http://files.strikerpg.com/uploads/1/3/1/3/131381363/9363157.pdf
    • https://cdn.shopify.com/s/files/1/0432/3750/7240/files/32238448252.pdf
    • https://cdn.shopify.com/s/files/1/0435/5640/5411/files/alteraciones_acido_base.pdf
    • https://cdn.shopify.com/s/files/1/0434/4270/0455/files/xililedanepek.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/dell_latitude_e6400_specs.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/zalama.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/77173150078.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5511/files/catia_v5_workbook_release_19.pdf
    • https://cdn.shopify.com/s/files/1/0438/0255/8621/files/cartoon_network_font.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/25568709530.pdf
    • https://cdn.shopify.com/s/files/1/0435/0282/9734/files/sat_1_december_2018_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0438/3725/9938/files/bimatidokazu.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.

FilenameKindSourceSize
font_00_sfnt_off000076bc.bin
630f10d3e6c4d89aed681ae91fa467d39e42cf1e6c8336ac99e56154a1a2eb7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BC 5144 bytes
font_01_sfnt_off00008876.bin
2d57ea0ecc67485d11058ebd7baa996d3cbc32830ff44d668709da76cd3973d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8876 10716 bytes

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