Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2836b9279cc3f1e…

MALICIOUS

PDF

72.0 KB Created: 2020-08-20 19:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc373b6b8e5c94e4a9a83a913196603d SHA-1: 92e8a16a020ac057b42a965aba807bcae646bcb3 SHA-256: b2836b9279cc3f1e78f02ba977799ba6d3c2dd50066a67cc01d169fb98dc0f97
160 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically a redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure related to a 'reaction paper about philippine agrarian reform program'. This, combined with the heuristic 'SE_ADVANCE_FEE_SCAM_LURE', indicates a social engineering attack aiming to trick users into visiting a malicious site. No scripts were extracted, limiting the analysis of further payload delivery.

Heuristics 4

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=reaction+paper+about+philippine+agrarian+reform+program
    • http://kubekitem.moderndaysolution.com/uploads/1/3/1/4/131454521/1476240.pdf
    • http://besavedo.whitezulubook.com/uploads/1/3/2/8/132814930/sesirufapeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/8506/9478/files/zipadakadudunidafakalin.pdf
    • https://cdn.shopify.com/s/files/1/0435/4614/9023/files/verbe_tre_et_avoir_en_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/59342976970.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8342/files/57358823055.pdf
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/9356729758.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24370467333.pdf
    • https://cdn.shopify.com/s/files/1/0436/1283/1907/files/bujexinowamadatorosu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/puwixozosovamixuvokejuma.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/annotate_in_ibooks.pdf
    • https://cdn.shopify.com/s/files/1/0440/8400/2981/files/14040391587.pdf
    • https://cdn.shopify.com/s/files/1/0429/1562/7175/files/woteza.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/77141901870.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/71355700253.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/voxin.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_off0000dcf9.bin
5b439cd1dbab457d6a2d151ab303f64dca9a5147930533a2e67f515a3db4f855
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF9 5400 bytes
font_01_sfnt_off0000ef2a.bin
bf357364312870e4bcdccde98a4365df5d170a2a0eb505bcb5a0785694559b35
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2A 10372 bytes