Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8c4ac1b8b5369c…

MALICIOUS

PDF

55.2 KB Created: 2020-08-23 23:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dcfbb855972dd579dba94d7e14dc5974 SHA-1: 242107750f0362c289527fc225357ca52b76bc68 SHA-256: cd8c4ac1b8b5369c6a32a6e8cd5ffa31954f508e3d4b8316c83e40717170dd8d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for 'ccna2 answers', suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL supports this assessment.

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.cc/pify?keyword=chapter+1+ccna2+answers In PDF document text
    • http://gejebiru.hypershft.com/uploads/1/3/1/3/131380005/novonafe.pdfIn PDF document text
    • http://kapola.tijaniya.org/uploads/1/3/2/8/132814930/sojekorobagorawam.pdfIn PDF document text
    • http://raralefa.cabsmatters.com/uploads/1/3/1/4/131409310/wiwivakix-rurarudofubixi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/gosomin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/tevori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/degikozonizujel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0298/5626/files/33865767070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/8341/2135/files/kms_activator_office_2007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/64262950603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4429/0205/files/architects_in_mumbai.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2922/4857/files/kulasetegavodukuxisazuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/joxitorusa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9331 5172 bytes
SHA-256: 570353231eddfc74028f7fb07672b23135d71ceb1693b4b00597ec1dde203f25
font_01_sfnt_off0000a4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4DC 13528 bytes
SHA-256: ba692ec43622cc55a2d3025e701c22bf3e4ac3dcc1a27548a692ddd9cfe33c34

Open this report in the interactive analyzer, or submit your own file for analysis.