Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee4e74ceccfd06b…

MALICIOUS

PDF

50.1 KB Created: 2020-08-11 07:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bdbcdf7aa2e3aa162a26359a43d3f05 SHA-1: a45318c6ef1f4b99855186fc83d1335480f27330 SHA-256: 5ee4e74ceccfd06b53142490d9dec259eeaa08e6bdd8f68221047ec2d27b5309
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One prominent link, disguised as a service manual, redirects to malicious infrastructure at 'https://ttraff.cc/wb?keyword=nikon%20d7000%20service%20manual%20pdf'. This indicates a phishing or scam attempt to redirect users to potentially harmful content. No scripts were extracted, but the presence of numerous external links and a malicious redirector strongly suggests a malicious intent.

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/wb?keyword=nikon%20d7000%20service%20manual%20pdf
    • http://files.sitemdowncowboychurch.com/uploads/1/3/1/4/131452958/wuzasovoxupujewaver.pdf
    • http://files.artworksgalleryco-op.com/uploads/1/3/0/8/130874031/8468673821b.pdf
    • http://files.mydhfastmandat.com/uploads/1/3/0/7/130738801/6e8a6d935b5.pdf
    • http://files.kissinkates.com/uploads/1/3/0/7/130775220/f9367c7f1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8716/6628/files/xipavavotosujub.pdf
    • https://cdn.shopify.com/s/files/1/0435/3264/8602/files/71228516694.pdf
    • https://cdn.shopify.com/s/files/1/0429/2047/6828/files/saganadefenulikalubeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/votapuroresiger.pdf
    • https://cdn.shopify.com/s/files/1/0439/9307/1774/files/julimulofu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/83918679079.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/luguwinenerabixutitumik.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/applicant_letter.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/60204963771.pdf
    • https://cdn.shopify.com/s/files/1/0451/8638/4023/files/academic_writing_and_research_skills.pdf
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/85424135174.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7926/files/read_file_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/26602334484.pdf
    • https://cdn.shopify.com/s/files/1/0428/7938/5756/files/bizogabopeluninusad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008473.bin
38efa7bb026208987eef1eaf9841f1016399d57d3350d6d1ac4ee9247ab3637d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8473 5616 bytes
font_01_sfnt_off0000977b.bin
5ba0674645b9f60d6de3a2a32ed0dabd82217451ae4151ad3fed213efa87acad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x977B 10516 bytes

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