Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db076b48838248c…

MALICIOUS

PDF

36.5 KB Created: 2020-08-23 01:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe2cda504b435f68384afd3dd541e6d3 SHA-1: 9cbc1161891748b1b6cedc1dff2b93b84d9179aa SHA-256: 1db076b48838248c2f3dd788d9e014f043df669005dadfc9e5e1e33480fba9ef
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=conditional+probability+worksheet+ap+statistics', suggesting a lure to download further content. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning to attract victims. No scripts were extracted from this sample.

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=conditional+probability+worksheet+ap+statistics
    • http://files.bullengarookadultriders.com/uploads/1/3/2/6/132681596/fomapofegaro-wopigadazodup-zevevamer-tirexilagenizo.pdf
    • http://files.religiousdoodles.com/uploads/1/3/1/3/131380440/mugoritogeri.pdf
    • http://files.bcpreventionnetwork.com/uploads/1/3/0/7/130739532/felarijus_rimotilaz_kuxokaxesi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/jawafum.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/mokakovimirituvonagire.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8423/files/46077835489.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/makalah_urbanisasi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/36085419515.pdf
    • https://cdn.shopify.com/s/files/1/0433/6284/4837/files/teverosifaxisad.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/mixukavivexi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4314/files/21947747513.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4236/files/foxilelobasavifemixaw.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_off00005128.bin
37bcfa3e872a45f31a61a0434c9bcce4088561230f00b1e219f365590b05d33f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5128 5464 bytes
font_01_sfnt_off000063c8.bin
5c490d53afed241521ed0109abfbc34053425571390f2a53c180300847300e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C8 9768 bytes

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