Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dce4143b933a767…

MALICIOUS

PDF

33.1 KB Created: 2020-08-14 22:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac8f2614ea9ee968c8b7ac35d5e9160f SHA-1: 13e4a1d9415e66a8e8c9911409ec2e00ddfdfb23 SHA-256: 7dce4143b933a767f015e98cbab1297fa732c1cd02ba7bc494ad33979950ca88
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wb?keyword=descargar%20el%20dsm%20v%20pdf'. This indicates the document is designed to redirect users to malicious infrastructure. The presence of numerous other links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning attempt to increase visibility for the malicious URL. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=descargar%20el%20dsm%20v%20pdf
    • http://files.idahoaeop.org/uploads/1/3/0/7/130775565/22460.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74133662670.pdf
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/panduan_belajar_photoshop.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/57297104480.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/kernel_task_high_cpu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/19550710893.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/25505839510.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2311/files/79807769970.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/public_relations_writing_newsom.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/chemistry_burdge_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/figatig.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/45591664509.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_off000044ab.bin
cb982925778f79d302df6099a43eecfcfe910f3aea127c8420be85108b271a04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44AB 5532 bytes
font_01_sfnt_off0000576b.bin
c4e12ffaa1d59c964f479a09dae07bd84dbd9fc33f26bc4a35b71511dbe9f63e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x576B 9496 bytes

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