Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de32d831f03054c…

MALICIOUS

PDF

40.7 KB Created: 2020-08-09 19:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 805169d5b1a857c55bc6ca7a7c6ce25f SHA-1: 0ff793c95796d868c3f0f3875c621ca5c30b36f7 SHA-256: 8de32d831f03054cce094ca7fe718ed5e43206fef4968d81bef94a991c0874ac
120 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, many pointing to domains that appear to be part of a link farm designed to manipulate search engine results. One prominent URL, 'https://ttraff.cc/pify?keyword=polite+expressions+worksheets+for+grade+2+pdf', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'polite expressions worksheets for grade 2 pdf', suggesting a lure to disguise the malicious intent. The primary goal appears to be directing users to malicious infrastructure.

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=polite+expressions+worksheets+for+grade+2+pdf
    • http://files.painsfireworks.net/uploads/1/3/2/3/132303019/8807698.pdf
    • http://files.frontierprojects.org/uploads/1/3/0/7/130775539/3928784.pdf
    • http://files.julieannejonmichael.com/uploads/1/3/1/3/131381411/1de801225e.pdf
    • http://fugaperum.kilbrittaingaa.com/uploads/1/3/0/8/130814328/1254678.pdf
    • http://files.oddsandendsphoto.com/uploads/1/3/1/0/131070112/sozejetif.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/silusurenesinedugojuzom.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/78310550312.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/raguwove.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/90170965740.pdf
    • https://cdn.shopify.com/s/files/1/0439/3749/7243/files/din_en_iso_2409_gitterschnittprfung.pdf
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/tixosovepubesejupem.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/donutamevadadoxugezej.pdf
    • https://cdn.shopify.com/s/files/1/0435/6148/4447/files/autosar_sws_bsw.pdf
    • https://cdn.shopify.com/s/files/1/0440/6935/5670/files/toro_electric_weed_eater.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijev.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_off00005f8e.bin
19f1945d8a7d1b539deed7f78a51173eeb1af0c27614e2bcb9672f3114c58208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8E 5660 bytes
font_01_sfnt_off000072e8.bin
6134ab5c3f4650cf17e49dc155b0000d5146498710c46fa490a429e4e3db8739		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E8 10268 bytes

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