Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a6481d0c2aa9bf…

MALICIOUS

PDF

47.4 KB Created: 2020-08-07 10:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 445a85532680d7b167b03d7ee73283c7 SHA-1: e83b35e004d32874f8dceaa72d5ab008730e3f0c SHA-256: e9a6481d0c2aa9bfe15320d85c3c859208c829721211ea7afb0165b8fabfea23
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a lure for a 'Bitcoin logo pdf download' which, when clicked, redirects to a malicious URL. The document also contains a large number of external PDF links, likely for SEO manipulation. The primary malicious IOC is the redirector URL, which is used to funnel victims to further malicious content.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.com/pify?keyword=bitcoin+logo+pdf+download
    • http://files.suehuitt.com/uploads/1/3/2/6/132681028/6436100.pdf
    • http://files.markalanbabcock.com/uploads/1/3/1/3/131379343/legasu.pdf
    • http://files.welshpromscymru.com/uploads/1/3/0/8/130873715/6479861.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/69662416098.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/34808089657.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6556/files/80503117177.pdf
    • https://cdn.shopify.com/s/files/1/0433/3305/8715/files/84219782241.pdf
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/59055217169.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/what_is_meetup.pdf
    • https://cdn.shopify.com/s/files/1/0439/4313/3352/files/gewasazofadureged.pdf
    • https://cdn.shopify.com/s/files/1/0440/8904/9238/files/meteriva.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/griffiths_electrodynamics_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/lowemebasidakubemef.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/marriage_d_amour_sheet_music_piano.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_off00006f1b.bin
449a29f0b4f205a65126c92cc29fbb5eb037898d2ea143a720790e4cedfd0725		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1B 4860 bytes
font_01_sfnt_off00007fba.bin
88db0ba0ae066313cef4f675959282c3a171daa27abd65f08836ff4902270a52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FBA 10248 bytes
font_02_sfnt_off0000a2ca.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2CA 4324 bytes

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