Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c4844dc54a9bae…

MALICIOUS

PDF

46.5 KB Created: 2020-08-10 15:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 946425e971ba2f982e61f6525582a3f5 SHA-1: 2330cc6d5827d5bcb68e1c64580e9d4422e74482 SHA-256: c4c4844dc54a9bae8fc26dbf98b5fae0415f523bde6f99a1daca2a2af3f83a98
120 Risk Score

Malware Insights

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

The PDF document contains a mass link farm, with a primary embedded link redirecting to malicious infrastructure. The document body text, though obfuscated, contains the URL https://ttraff.cc/pify?keyword=analisis+estadistico+definicion+pdf, which is flagged as a malicious redirector. This suggests the document's purpose is to lure users to malicious sites by disguising the link as a benign document title.

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/pify?keyword=analisis+estadistico+definicion+pdf
    • http://files.stallaureas.com/uploads/1/3/2/6/132681415/peviwatifugetovud.pdf
    • http://files.paprince.com/uploads/1/3/0/9/130969045/befiduxajug.pdf
    • http://sejesu.alamodekabashsewingshop.com/uploads/1/3/0/7/130740049/guviruge-nuzug-xatere.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/makalah_sejarah_dinasti_abbasiyah.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/56320893158.pdf
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/welokomasop.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/gesufesuzukuja.pdf
    • https://cdn.shopify.com/s/files/1/0455/7878/0837/files/periodic_table_gcse_aqa.pdf
    • https://cdn.shopify.com/s/files/1/0436/1538/7811/files/susolesaxazad.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/4764338826.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/8896640362.pdf
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/likisufozilirawa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/7th_grade_mathematics_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/59114547616.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/59630554063.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_off000075c3.bin
9f5f61ead284319e79b681c9bdf303efdd4cb741280bcefcbe8b3ddc8137747c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C3 5040 bytes
font_01_sfnt_off000086f7.bin
7cb33f38cdb54b870cecf0a0446a57a53d2a2978fa5acaec9f4b1114d4f9f595		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F7 11296 bytes

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