Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8ed38d67a6450d…

MALICIOUS

PDF

67.1 KB Created: 2020-08-10 06:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4db2dc119274a2e1af46bb33ac8e1a08 SHA-1: 725ed492a70c3efb22a9fdb325503c11cfd18b94 SHA-256: cb8ed38d67a6450d35aee8e4c110ddfc53d6edba9baff6b45cb519b77d2ad03f
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.com/pify?keyword=contoh+obat+analgetik+pdf'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, and the document body is largely unreadable binary data, but the presence of the malicious URL is sufficient evidence for the attack pattern.

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=contoh+obat+analgetik+pdf
    • http://files.thebeatlestour.net/uploads/1/3/1/3/131380297/vepuwegitiw-bipigelabatoba.pdf
    • http://jotajen.kairostt.org/uploads/1/3/1/8/131871721/gazatas.pdf
    • http://files.goldenreiki.co.nz/uploads/1/3/2/6/132683154/faf2ecd93ef.pdf
    • http://files.emilyallredphotography.com/uploads/1/3/2/7/132740595/c41fc.pdf
    • http://files.fionarimmer.co.uk/uploads/1/3/0/7/130775701/wavijozub-senudax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/gipexujuwulet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/19240877318.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/xewukim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/13748096840.pdf
    • https://cdn.shopify.com/s/files/1/0437/8610/9086/files/learn_korean_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/hallelujah_chorus_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/13722459508.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8848/files/tabewoguworelatulufeva.pdf
    • https://cdn.shopify.com/s/files/1/0431/4261/1095/files/livro_after_5_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/telikakeriwavemowo.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_off0000c9c8.bin
8c9fb946c85e44afa0727e91f4910475ffbf36bcf627e6727bae9c21cd8ccccd
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C8 5140 bytes
font_01_sfnt_off0000db3c.bin
061feac09a543995208c586c85bb3653ad40c933f0d2e87a4072dd50a0824bb4
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3C 10472 bytes