Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c97d1e954c78b0…

MALICIOUS

PDF

73.6 KB Created: 2020-08-12 04:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0996310505b6b48e2ce1ebd4854a606e SHA-1: c27eac40118e55f4e51dede08f59dacc548be753 SHA-256: c0c97d1e954c78b0cafb01a82fb0b1001ed12bf647987c0763743ab3b6268478
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/pify?keyword=acetylation+reaction+pdf
    • http://sefex.ebrnhouston.com/uploads/1/3/0/8/130874254/welidepalofodarufiba.pdf
    • http://files.badassoffitness.com/uploads/1/3/2/6/132682790/matemiviwixuma.pdf
    • http://narulux.lifeistooshortnottobeirie.com/uploads/1/3/1/4/131437812/xubekaxuse.pdf
    • http://files.anstrutherlifeboat.org/uploads/1/3/1/4/131407152/putizefaperijizuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/63436137419.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0021/files/53917147502.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4359/files/59166666198.pdf
    • https://cdn.shopify.com/s/files/1/0434/0524/6631/files/39320215518.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4181/files/wutusinor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/81328234707.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/57036797764.pdf
    • https://cdn.shopify.com/s/files/1/0437/0448/3993/files/swot_analysis_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/satapivepafawipibabu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/67820643910.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/cheap_capture_card.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_off0000ce9f.bin
de863278e7dc99f579af84b596d4d9fd1d76de6b219d40ef0c50515eb8240a8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9F 4852 bytes
font_01_sfnt_off0000df28.bin
88cc797aeb5bf6d9b41253d14424d2ba6e7d0a669a781e34d638899950096cac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF28 14036 bytes
font_02_sfnt_off00010b10.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B10 4324 bytes

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