Malicious PDF — malware analysis report

Static analysis result for SHA-256 3159245c90bd1aca…

MALICIOUS

PDF

52.5 KB Created: 2020-08-06 15:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ff52afb6cbcbb3c8e70fd2f2397fe08 SHA-1: cedb7badfa0df8864c819867bad7c85148ccebd3 SHA-256: 3159245c90bd1aca972056ec5a7a7a66fdb6cdaa7f7059ba42a99b4f76147118
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to traff.com, a known malicious redirector. The document body, though partially corrupted, contains text suggesting it is a "Examen ceneval simulador pdf", likely a lure to entice users to click the malicious link. The PDF_SEO_LINK_FARM heuristic further indicates a large number of external links, many hosted on Shopify, suggesting a link farm designed 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=examen+ceneval+simulador+pdf
    • http://zizerip.4u2believe.com/uploads/1/3/1/4/131438641/fiwokonuzelifa.pdf
    • http://files.luisagonzalez-interiordesign.com/uploads/1/3/0/7/130740257/kiposurofob.pdf
    • http://files.corijacobs.com/uploads/1/3/1/3/131380438/zinopexum.pdf
    • http://files.allseeingeyedesign.com/uploads/1/3/1/8/131871740/jojadetudexu-dupotagu-furoxatosuw-dowiwek.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/69441328640.pdf
    • https://cdn.shopify.com/s/files/1/0438/4758/1856/files/antologia_corta_de_poemas_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexuxedixu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5584/0422/files/95181644755.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/25712459560.pdf
    • https://cdn.shopify.com/s/files/1/0432/2384/2983/files/gaxunigumuto.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/49258107381.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kilezibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/31306601521.pdf
    • https://cdn.shopify.com/s/files/1/0437/2522/6152/files/50888809800.pdf
    • https://cdn.shopify.com/s/files/1/0430/7750/1095/files/96090118666.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4040/files/converting_kindle_content_to.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074e9.bin
6fe4cf096270368f76423ab4df5ce078a275763c84b7ed8682b0da8881ed1b1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E9 5384 bytes
font_01_sfnt_off0000872d.bin
0265974e0371f270c05a430fee6bf12bdb119bcb9fd740c06cd19850e6208113
pdf-font-stream PDF embedded font (sfnt) at offset 0x872D 11856 bytes
font_02_sfnt_off0000ad92.bin
028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD92 16312 bytes