Malicious PDF — malware analysis report

Static analysis result for SHA-256 40da6a046bb916a6…

MALICIOUS

PDF

41.6 KB Created: 2020-08-12 04:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02b9ae2bc93e34790d4633885dd874bf SHA-1: 7e9acd7df45a711defbc1c0111d2aed35ad1b125 SHA-256: 40da6a046bb916a644068bd0fac27dd6c80ba87b1e6764c95b9f4b4273831982
150 Risk Score

Malware Insights

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

The PDF contains a high volume of embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the same malicious URL and a large list of other PDF links, suggesting a link farm or redirection scheme. The primary malicious URL is https://ttraff.cc/wb?keyword=contra%20la%20pared%20mexicanos%20primero%20pdf, which likely leads to further malicious content or phishing pages.

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.cc/wb?keyword=contra%20la%20pared%20mexicanos%20primero%20pdf
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdf
    • http://files.stjohnsstafford.org/uploads/1/3/0/8/130814115/2512.pdf
    • http://files.drlindaford.com.au/uploads/1/3/1/3/131379049/nobekuporoxiv-xupezewax-peten-kabil.pdf
    • http://files.honeybunchbeeswax.com/uploads/1/3/1/4/131453843/0f6f260d708ce.pdf
    • https://cdn.shopify.com/s/files/1/0428/9367/2604/files/sofoderoremal.pdf
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/bateria_riesgo_psicosocial.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/81162436291.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1682/files/agile_software_development_principles_patterns_and_practices_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/61572090830.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/puzemitu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1986/0125/files/56936708967.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/gefenelipi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/how_to_shade_a_minecraft_skin.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/libro_sobre_almas_gemelas.pdf
    • https://cdn.shopify.com/s/files/1/0443/6181/0076/files/ignatius_catholic_study_bible_old_testament.pdf
    • https://cdn.shopify.com/s/files/1/0436/6332/7385/files/kcet_2020_syllabus_download.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_off000061f9.bin
f831d321cdf4f5ce6c2950e0dbdc871acd0a4fe91b5e6c8244ccf02738328f20
pdf-font-stream PDF embedded font (sfnt) at offset 0x61F9 5272 bytes
font_01_sfnt_off000073d1.bin
9ea485d437e24711e877dbf090a323a99ab9ea1e4ef3b4e01cdcd3d4e94abbc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x73D1 11080 bytes