Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f34508000feee42…

MALICIOUS

PDF

49.4 KB Created: 2020-07-21 14:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d28efec33f9e3c5c4d52413fd848b2e SHA-1: b83180ff5bd7cbf3088e7d5963bffc9ca086276b SHA-256: 9f34508000feee42b1f1315ba168027bdb06ef2f352fef6450df2b33bfa422ee
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates a direct link to suspicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, likely for SEO manipulation or to distribute malicious content. The document body, though heavily obfuscated, contains text related to job evaluation, which is likely a lure.

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=importance+of+job+evaluation+in+human+resource+management+pdf
    • http://files.corriebeth.com/uploads/1/3/0/8/130813550/2821064.pdf
    • http://files.matthebert.net/uploads/1/3/2/6/132695401/gijaminoxowa.pdf
    • http://files.kirstenbuttononline.com/uploads/1/3/1/0/131070178/ligagivebo.pdf
    • http://files.kirstenbuttononline.com/upload
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/95035522597.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/nuxil.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/fujamek.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8919/files/timaxefepojilazemuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5757/files/vipabegijaw.pdf
    • https://genonirog922543524.files.wordpress.com/2020/07/63289321814.pdf
    • https://gikigofuleru.files.wordpress.com/2020/07/83342692562.pdf
    • https://sinezuve.files.wordpress.com/2020/07/wofijo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/89213637822.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/55716253504.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/87580013071.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/togifidulokofimosawidaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/deduwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/nuzitilupubuxoludatufeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/24260100115.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/nobuvelutilapijozo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/31956045750.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/44674305280.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_off00008264.bin
7f5c49d938f70f782be29b88995ccecbbbc5d51873dfb89ee9badb2d3ce58b0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8264 5664 bytes
font_01_sfnt_off00009569.bin
cea5beb006b78ae9fe795f1e690959b49d6c23b70e16a51d60dadad866fd46fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x9569 10072 bytes