Malicious PDF — malware analysis report

Static analysis result for SHA-256 82bf65914476c260…

MALICIOUS

PDF

41.9 KB Created: 2020-08-07 20:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77a17cb3cc019ca771c91db8135f8676 SHA-1: 8787e0f45aeda2190f339e0c8746870d9f94c132 SHA-256: 82bf65914476c2603201c21ba6fef7c8ac8f00a730b31a4a871efe610ed8994a
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily corrupted, contains text related to 'Byomkesh bakshi series pdf free download' and the URL of the malicious redirector, suggesting a lure to trick users into downloading content. The presence of a malicious redirector indicates an attempt to lead users to malicious sites or downloads.

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=byomkesh+bakshi+series+pdf+free+download
    • http://files.implicitbiascleanse.com/uploads/1/3/0/7/130740110/bajofutivikikugufoku.pdf
    • http://files.kfundtutoring.com/uploads/1/3/2/6/132681325/fusuzana.pdf
    • http://gazajoru.rannveigkaradottirsoprano.com/uploads/1/3/0/7/130775971/xajudi_mopekufe_sukab_fudasiled.pdf
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/notisuvewerix.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/66472469598.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/65264356916.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/66752886443.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/nokoxijeguzaxafilulis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/override_compareto_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/256246201.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/wesanipevirilivikepagevuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/slideshare_downloader.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/hayward_power_flo_lx_pump_manual.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_off00006580.bin
01a1b3fe14ab619e4745e6240b78620c646ca596ab7836efe24f53b9ca0350cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 5728 bytes
font_01_sfnt_off000078ee.bin
c50229fc0ff8236fdcafcb3a98223119078eaafb6120c88a205d1549c869ea31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EE 9896 bytes

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