Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbf38df0f1d2f1f…

MALICIOUS

PDF

59.4 KB Created: 2020-07-30 11:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3ad7c5fb40b9372afca8ff4e235ba7e SHA-1: a106d8a4a826d044ac058614431ee51847c9c5ff SHA-256: 4bbf38df0f1d2f1f39663bb53fc814a1c51a703b2c1e5e264ad4fc42075ae088
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to 'ttraff.cc'. The document body, though heavily obfuscated, suggests a lure related to 'budgetary and non budgetary control techniques in management pdf'. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially improve search engine ranking or distribute malicious content. The primary malicious IOC is the redirector URL.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=budgetary+and+non+budgetary+control+techniques+in+management+pdf
    • http://files.stmark-lutheran.org/uploads/1/3/0/8/130814926/wubotemovenibeb-vudefejusefajav-vipupijawu.pdf
    • http://files.seeyarealsoontravel.com/uploads/1/3/2/6/132696018/savajafukudumurije.pdf
    • http://files.soundofsilver.net/uploads/1/3/0/7/130739379/nudabuluzu.pdf
    • http://files.alohadrycleaning.com/uploads/1/3/1/4/131454699/mavudomupo-firif-povazozadipu.pdf
    • http://files.buffalorutlandcompany.com/uploads/1/3/1/6/131606146/8085128.pdf
    • http://files.seeyarealsoontravel.com/uploads/1/3/2/6/132696018/savajafuk
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/lubenipa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3362/3708/files/91275252574.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4602/files/jomudusonol.pdf
    • https://cdn.shopify.com/s/files/1/0428/2908/6887/files/18760651016.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/napidago.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8460/files/89622339675.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/16353478795.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/97916106508.pdf
    • https://cdn.shopify.com/s/files/1/0427/6859/7158/files/tumaropasumoralexinak.pdf
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/pufopuxigafatoditemijeku.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/neruli.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44628440260.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/venimakibi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/zorulava.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_off0000a71d.bin
e6d162adde35924db28b3148d753cec475b608fd923253856ab6929d25f04998		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA71D 5868 bytes
font_01_sfnt_off0000bae2.bin
a14e97d6265e5f4efeb5c2999ade3d28c63eed0d95ed0f6e67225015ef13cb3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE2 11080 bytes

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