Malicious PDF — malware analysis report

Static analysis result for SHA-256 8820e9df633183c8…

MALICIOUS

PDF

46.1 KB Created: 2020-07-27 16:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcdc6c4ae89218dbc8350dbfda96e548 SHA-1: 7064b4af9eecff1a79f237ae80938eeb9f3ccf07 SHA-256: 8820e9df633183c86ccc55c681ea7b12d3c3ec63f1b4d35a98494591e3d2b322
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links redirects to a known malicious redirector at ttraff.cc, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains text related to a 'form for school of nursing', suggesting a social engineering lure.

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/pify?keyword=is+form+for+school+of+nursing+out
    • http://files.charliebreckenridge.com/uploads/1/3/1/4/131437493/d723e9.pdf
    • http://files.affinitybodyworks.com/uploads/1/3/1/6/131636814/d244cf369.pdf
    • http://files.fortheloveofapet.com/uploads/1/3/0/7/130739835/b62c20561.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2313/files/75571280720.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/xipumekopojo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/metili.pdf
    • https://cdn.shopify.com/s/files/1/0429/3292/8671/files/niwepeberobafevale.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/gijerolik.pdf
    • https://cdn.shopify.com/s/files/1/0431/8537/3333/files/78205460191.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/41321552608.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/wekitugalile.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/pumor.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/kapozekirevegesigeworoze.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/gebimirupepelirujejewi.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_off00007813.bin
497e3d032c9d33b3a178d23de4336684191841c2d165ee3636ef46728d76927c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7813 4788 bytes
font_01_sfnt_off00008823.bin
5ead2287680a6419ca54c34e5bd2f17194d28715adb73f9a1e27e036da15d876		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8823 10196 bytes

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