Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff05e02d5d58b127…

MALICIOUS

PDF

38.6 KB Created: 2020-08-10 22:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b9504b8557ef06817f2338a380c25e5 SHA-1: cebe2bc67bcb0e72655658f5b9f31062f75f5bd7 SHA-256: ff05e02d5d58b12796a4bcd3c14854c44e552a9024452e0c63a230215d02669b
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to SEO poison, with a primary malicious redirector URL. The document body, though heavily obfuscated, contains text related to 'Barron s ielts practice exams book pdf' and the malicious URL. This suggests a social engineering lure to drive traffic to malicious infrastructure, likely for further exploitation or malware delivery.

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.ru/pify?keyword=barron+s+ielts+practice+exams+book+pdf
    • http://files.lasallecatholic.org/uploads/1/3/0/8/130813325/aa1ccc435bbad24.pdf
    • http://kufefaf.greatautismresources.com/uploads/1/3/1/0/131070571/9252334.pdf
    • http://files.childrensbookconnections.com/uploads/1/3/1/4/131408250/6093365.pdf
    • http://files.esqstp.com/uploads/1/3/2/3/132302871/zufudugiwitez.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/wibebubadavakebadedutiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/les_mthodes_d_amlioration_continue.pdf
    • https://cdn.shopify.com/s/files/1/0431/0545/2193/files/45693118578.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/puraxubikimibiviguk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0394/4858/files/46872364750.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/47443800097.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/respirao_aerbica_e_anaerbica.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/88442908860.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vixegenosevisime.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10542261424.pdf
    • https://cdn.shopify.com/s/files/1/0434/0334/6078/files/fawopalejunevekik.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_off000057f8.bin
150a862c6efa687ee28cfdccf27675375fad232de5c238f6f8d0e3e4a4a3663e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F8 5624 bytes
font_01_sfnt_off00006af6.bin
56973962ffc1684f692e5dcba8c8f5fe523ad49820875d3dfeb12b274e31346c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF6 10468 bytes

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