Malicious PDF — malware analysis report

Static analysis result for SHA-256 83651f367c69c696…

MALICIOUS

PDF

44.0 KB Created: 2020-08-12 08:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68434cbfd91df6f1ab2e48bfa5908601 SHA-1: 680380e77ca3152dde1f9514024437a4b419905d SHA-256: 83651f367c69c69611703e1d6c71962e6eeacf4aaf2d03eb69facdc97aa4f43b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'beginner reading comprehension worksheets'. The presence of a malicious redirector and a large number of external links indicates an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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=beginner+reading+comprehension+worksheets+pdf
    • http://files.stephanvandertoom.nl/uploads/1/3/1/4/131454190/1404726.pdf
    • http://files.bereangracechurch.com/uploads/1/3/0/9/130969699/dbfb4aa.pdf
    • http://xivupat.littlepicassobaltimore.com/uploads/1/3/1/6/131636725/2101235.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/bewavevabufubaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/wusixapegapajowedopejave.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/betuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/balopeguw.pdf
    • https://cdn.shopify.com/s/files/1/0439/0633/4888/files/gisulege.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/puxodudi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6131/2676/files/zezegasopopisonarabawulaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/1755/0499/files/juvarugovinogo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7958/2374/files/weight_gurus_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/34111348107.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/ambiente_de_trabalho_do_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8592/files/16251503044.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/dewalt_planer_dw735_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6402/4470/files/14153950378.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_off00006b52.bin
851e41ae893e5f92ae646d69ccd0816ddca2bd1414c7ce9583eaacfbfc61e569		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B52 5744 bytes
font_01_sfnt_off00007ec2.bin
d1d0627ee13814d88008885db158fc8c91282dfd6c04539e41658abcd54133c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC2 10060 bytes

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