Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a3683a90d46d25…

MALICIOUS

PDF

46.3 KB Created: 2020-08-24 04:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84e6ee5f959f1f3e93ebae9da785612d SHA-1: bd0d25fdcbd42305da161838b8c420d9e6056221 SHA-256: 33a3683a90d46d257332fa928e807d8a2a6fb34ef4ecd7bf0a6f6c8c5612889e
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, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though partially corrupted, suggests a topic related to bibliographic sources, likely a lure to disguise the malicious intent. No scripts were extracted from this sample.

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.com/pify?keyword=types+of+bibliographic+sources+of+information
    • http://files.nwiioa.org/uploads/1/3/0/8/130815228/1303576.pdf
    • http://files.firstofwarren.com/uploads/1/3/0/7/130775228/kufukafowid_tukupa_rosisuvimu_xejuf.pdf
    • http://wusos.ashlynnsboutique.com/uploads/1/3/1/4/131437594/tuganixesifatur.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/57976436326.pdf
    • https://cdn.shopify.com/s/files/1/0433/7169/2188/files/android_ui_automation_testing.pdf
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/57042354968.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/6251247346.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/wupokeviniwababilazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8330/files/bonolone.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/vunelezidiboratu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9671/0047/files/brookstreet_timesheet_applicant_login.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/bosugowubowutobosaragik.pdf
    • https://cdn.shopify.com/s/files/1/0432/1447/1330/files/ley_general_de_la_administracin_pblica_costa_rica_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/9093/4949/files/93319158292.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7205/files/actitud_definicion_segun_autores.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0071/files/2476263911.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_off000074d6.bin
44c467c0e1fbad5a75f097f43d4da26945307d628772915781132463275ff538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D6 5620 bytes
font_01_sfnt_off000087d4.bin
4459fab5dcc64d93d551e30e47948c2180de584bde6cf85eebbbe5ea47ee98c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D4 10636 bytes

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