Malicious PDF — malware analysis report

Static analysis result for SHA-256 226d99dd29111a5e…

MALICIOUS

PDF

41.8 KB Created: 2020-08-19 21:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1874198e9ba995a3ca7ca62137646064 SHA-1: 0dbc829530c50c0374910067a1d0b4bfef63acc3 SHA-256: 226d99dd29111a5e780a01d77aa3cf7cfcd22825f985a8b69f5c69f72a9d4ca8
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs. The presence of a 'download button' lure further supports the malicious intent. The primary malicious URL is https://ttraff.cc/pify?keyword=worksheets+of+present+indefinite+tense, which likely serves as a gateway 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=worksheets+of+present+indefinite+tense
    • http://files.domicilyachthotel.com/uploads/1/3/1/1/131164472/gemofivixarudu-nakojarifaf-panatidereja-wowoparopovo.pdf
    • http://files.clintweiler.com/uploads/1/3/2/3/132303378/d480ba.pdf
    • http://files.carondeletchurch.org/uploads/1/3/0/7/130776433/gagewolavos_lanararim_mubojide_tujarapuris.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8989/files/sound_of_silence_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/43344761945.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5512/files/xutemuzojejutipakepube.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/lalopuzowitogeguxojil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72619586694.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/67572401902.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_off000057aa.bin
f879eb716452aac7fe451372ac757712c5e0fa19630a336af4ffea9f646635ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57AA 4752 bytes
font_01_sfnt_off000067d7.bin
a2fe7d0e97e8d7b6a9456e372431fb801801b0537b4f1aa7c6ee157152439bc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D7 10676 bytes
font_02_sfnt_off00008c62.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C62 4324 bytes

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