Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed79fc6c042a6e63…

MALICIOUS

PDF

43.6 KB Created: 2020-11-02 15:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e6b6de63c294c56fe05d233b7bce19c5 SHA-1: 271e4aab58f1da35c0e8a4d0d5b20b0ed6148845 SHA-256: ed79fc6c042a6e63874fbe0f73adb90a5b149b5546091a65539063212817de67
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to known malicious redirectors or SEO link farms. The primary redirector URL identified is 'https://ggtraff.ru/aws?keyword=words+starting+with+super+meaning+above'. This suggests the document is designed to funnel users to malicious websites, likely for phishing or malware distribution.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/aws?keyword=words+starting+with+super+meaning+above In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_5f930c208b2b5.pdfIn PDF document text
    • https://nujidigazinuwag.weebly.com/uploads/1/3/4/3/134318548/xuneditupibivowemeva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_5f8f17ac9c582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5f874c9992302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5f952bb333fa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5f8b64da98738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f881f047a5f2.pdfIn PDF document text
    • https://xuxutisunabase.weebly.com/uploads/1/3/4/5/134506464/ac8ca201f88452.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/1/0266/9484/4587/files/tera_term_vt_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/milipow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3057/5787/files/8185951906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/4924/4583/files/buxose.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_off00006c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C59 5644 bytes
SHA-256: f8a452165ad141de2c4d59c002a66d208a887031ad1abbb3c4835456c4097ddb
font_01_sfnt_off00007f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7A 10076 bytes
SHA-256: 2c28c29038b60eea0da7f45c575c4f0da78d96916c3d5867d34e9a46431a77d1