Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae4f2f73146d71b…

MALICIOUS

PDF

46.4 KB Created: 2020-08-08 15:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3decb2013ca40f33e0c42377c9b9946 SHA-1: 5faba003b008827813e6aca464909101f4997c5c SHA-256: 5ae4f2f73146d71b8b37aec817c47cbeb2d96784f641cdbbe240e0315ebd59d7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a malicious redirector disguised as a 'nitro pdf to word converter crack download'. The document also includes a large number of links to other PDFs, likely part of a link farm for SEO manipulation. The presence of a password-protected archive lure suggests an attempt to bypass gateway security by encrypting the actual payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=nitro+pdf+to+word+converter+crack+download
    • http://files.asweetpetitedesigner.com/uploads/1/3/0/7/130775195/080579d8c96.pdf
    • http://files.live-life-organized.com/uploads/1/3/1/4/131408117/lunopib_japamo_jakowezedux.pdf
    • http://files.kingsporthorses.com/uploads/1/3/1/6/131607374/014d297abc02d.pdf
    • http://files.thevillagevoiceschorus.org/uploads/1/3/0/8/130813108/1453475.pdf
    • http://files.postplumbingheatingandair.com/uploads/1/3/0/8/130813409/fc6987d96b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/6866/0643/files/sujoziza.pdf
    • https://cdn.shopify.com/s/files/1/0437/6055/0046/files/mevugitazemomofoxaleki.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1468/files/77070560697.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3042/files/la_conjugaison_12020_verbes_bescherelle_hatier.pdf
    • https://cdn.shopify.com/s/files/1/0436/5480/7717/files/fibonacci_sequence_recursion.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovegutug.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/c_g_jung_memories_dreams_reflections.pdf
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/vodugezogujolazu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6348/4315/files/ninafabajitatabubologo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2155/7150/files/problem_and_solution_essay.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000658f.bin
04adc18e6bd24916810600dbadcaa04a4defa250131b25b66a6b520c06e66734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658F 4944 bytes
font_01_sfnt_off00007684.bin
30d7c22c4cf2d37fd2fdbcae43c004b6fdf79240720ad9bfd2f11725379fdc2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7684 12284 bytes
font_02_sfnt_off00009e7f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E7F 4324 bytes

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