Malicious PDF — malware analysis report

Static analysis result for SHA-256 de9ee2621dd3e2f2…

MALICIOUS

PDF

47.0 KB Created: 2020-08-10 13:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 828f76c5ebd3bddbcdc3efb70376f193 SHA-1: 075ab1f042f5f1c9025a037dc2216f240d3ef2c4 SHA-256: de9ee2621dd3e2f2d65f62f478b981cf2cd4590add1723942784444ec06e78b1
128 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, characteristic of a link farm designed to improve search engine rankings or distribute malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=sahasra+ak+arabya+rajani+bangla+pdf+download', is identified as a malicious redirector. While the document body contains text related to downloading PDFs, it is heavily obfuscated and likely serves as a lure. The primary attack pattern involves directing users to potentially harmful external resources.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=sahasra+ak+arabya+rajani+bangla+pdf+download
    • http://files.alliguem.com/uploads/1/3/0/7/130776592/labobidixewelezuf.pdf
    • http://files.knoxtrailforge.com/uploads/1/3/0/7/130740124/xegiw_suwibopozepulur_tolabure.pdf
    • http://nerud.kajancbd.com/uploads/1/3/1/4/131406086/neginu.pdf
    • http://files.pinetreechalet.ca/uploads/1/3/2/6/132696512/2312335.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/ruby_pig_latin.pdf
    • https://cdn.shopify.com/s/files/1/0432/9675/1774/files/degerenejefisos.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/vabaruterasofif.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/zanubimeva.pdf
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/merusokelufisanajusizuvul.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2739/files/belly_fat_loss_workout.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/notipawowamoke.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/86470094877.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/duwudevugimo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/93984257801.pdf
    • https://cdn.shopify.com/s/files/1/0428/2620/3302/files/90562899505.pdf
    • https://cdn.shopify.com/s/files/1/0435/8314/4093/files/tapamimemeluvaxulotozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6974/files/48377406195.pdf
    • https://cdn.shopify.com/s/files/1/0430/8520/1561/files/37467638560.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005789.bin
32f0379d2ebabbab0a1509c91b6c8efb67dce10fd53d85314a279e2011687d28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5789 5880 bytes
font_01_sfnt_off00006b8b.bin
2eb0e72338fec35806f5325500ccfd83ae394444bef1e8447267a4f7ba5e32ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8B 10688 bytes
font_02_sfnt_off00008bf8.bin
fec6275ac08be69205e56bb6259bf8e961453b46689d3433a99fc3e90f9d7d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF8 10024 bytes

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