Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1aaaeeacb60898…

MALICIOUS

PDF

39.9 KB Created: 2020-07-13 22:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 765a2a712a43701599d3116c6c988225 SHA-1: 20b5d2b423fbf4fd756e17859fd3d24a2f1e21fe SHA-256: 5a1aaaeeacb6089836856f32fd84279d5bf19e33c6a22aa4158550fd827da309
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wb?keyword=gyldendal%20formelsamling%20matematikk%20pdf'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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.cc/wb?keyword=gyldendal%20formelsamling%20matematikk%20pdf
    • http://files.vancareproject.ca/uploads/1/3/1/3/131384171/badavukijuvif_gapunebap_jezaxobakivoj.pdf
    • http://files.dpdesq.com/uploads/1/3/0/8/130874352/628c8578a5.pdf
    • http://files.knochsoftball.com/uploads/1/3/0/7/130739782/6411530.pdf
    • http://files.nrshamerica.org/uploads/1/3/1/4/131437490/lezapusogoxoj_zufamerelarexo_nufagusefenini.pdf
    • http://files.superbloomcoffee.com/uploads/1/3/1/8/131871704/13bc9f9b3d5a6.pdf
    • http://files.nrshamerica.org
    • https://piviraxiwak.files.wordpress.com/2020/07/pejamomexuxegine.pdf
    • https://rojuribopu.files.wordpress.com/2020/07/11239597405.pdf
    • https://komimub.files.wordpress.com/2020/06/66275422495.pdf
    • https://zulafavodu.files.wordpress.com/2020/07/taledeze.pdf
    • https://dafowamu.files.wordpress.com/2020/07/mokafimibidu.pdf
    • https://jobowinilu.files.wordpress.com/2020/07/zexanuguzirabono.pdf
    • https://noratum.files.wordpress.com/2020/07/devafarifuvawulewula.pdf
    • https://jikekivadu.files.wordpress.com/2020/06/tinakatesutamemanu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peboginesewuxexadamo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sesolofulazige.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/70249684914.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/96098850648.pdf
    • https://cdn.shopify.com/s/files/1/0433/5783/1326/files/mijopilikop.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/tetagonumuzaxogokubewir.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_off00005b1c.bin
8fd52a07c77f9b1554199492f5f266dcd9a377f973527e3dc7c00a90ab14ec15
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1C 5344 bytes
font_01_sfnt_off00006d45.bin
f9f392d45c5d52ae1859335a7af7ca038dbde085a9811c2cd4e078b57272c365
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D45 10472 bytes