Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c587a5468e4aa6…

MALICIOUS

PDF

37.4 KB Created: 2020-08-05 09:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ab32826ee85c79812eff743b3d74535 SHA-1: 873bbcfc0c1c7bf1a455cb1c13e6ab13fa07f2da SHA-256: d3c587a5468e4aa6fbe05a9701a94ed96d8ea71c26e05d384ad22c1199af31bc
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a gospel chords PDF. This link, 'https://ttraff.com/pify?keyword=amazing+grace+gospel+chords+pdf', leads to known malicious infrastructure. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination. The presence of a visual download button further supports a lure-based attack.

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.com/pify?keyword=amazing+grace+gospel+chords+pdf
    • http://files.northwoodsquiltguild.net/uploads/1/3/0/7/130776246/9d87468.pdf
    • http://files.sjhsasb.com/uploads/1/3/1/3/131379439/cd87a7eade.pdf
    • http://files.kinderdancebrazoscounty.com/uploads/1/3/1/0/131070713/numatabatenedapus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4150/files/wonixetopetomufake.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1391/files/acrobat_reader_to_converter_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vebamuwonodivori.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/66013010430.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/67095914000.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/subject_verb_agreement_exercise_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/c_linked_list_stl.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/rofosevezaput.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/sirogo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7656/4630/files/87947065171.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_off000052ed.bin
2250c3395ad46ca7884f890c7cae9c24e1d07fa72bddf932f1eb6a062ed9acd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52ED 5608 bytes
font_01_sfnt_off000065d7.bin
c5b2465f981ce70b4d6a5be1d2e63cb849ce40218ea09622a80cde3c8e7b68ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D7 10324 bytes

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