Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b530c14ceda2f5…

MALICIOUS

PDF

42.5 KB Created: 2020-08-24 23:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44305dad9af8fb88001777a65362b0ac SHA-1: eb01ed51c0da82733b10e580db582d9e43a6f071 SHA-256: f6b530c14ceda2f5355329deec370b2f9859f22864a9efdbe1987e66a9f279f2
120 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.com, which is disguised as 'daily star crossword answers saturday'. This suggests a social engineering lure to trick users into visiting a malicious site. The document also contains a large number of links to other PDFs hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content.

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.com/pify?keyword=daily+star+crossword+answers+saturday
    • http://repetedu.homeschoolbrew.com/uploads/1/3/0/8/130874030/3910324.pdf
    • http://lifaza.shoreliteracy.org/uploads/1/3/0/8/130814297/ginefalivati_kevon_kaxugom_dasemog.pdf
    • http://files.dmd3d.com/uploads/1/3/1/0/131070165/43961993d1.pdf
    • http://files.allsaintsws.net/uploads/1/3/1/6/131637055/5850007.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/43142972563.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/bopajusitofetuvoxirasu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/factoring_polynomials_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/vozefewuzibigizojed.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3777/files/fimugerekufipusa.pdf
    • https://cdn.shopify.com/s/files/1/0440/6283/4853/files/catia_v6_assembly_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0440/6237/6101/files/risabonetegiki.pdf
    • https://cdn.shopify.com/s/files/1/0440/3858/6518/files/gamp_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/bubble_letter_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/3276/2785/files/pdf_to_cdr_file_converter_software_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/wawafale.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.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_off00006722.bin
89b18145f623e867c05994a614556553034bb901064cdf1d2d7f5aac01947e16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6722 5128 bytes
font_01_sfnt_off000078ad.bin
5d0e669f5c59c93ed03ba3763d0540e0a6affe29b10292870d8dff658362b8cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AD 10600 bytes

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