Malicious PDF — malware analysis report

Static analysis result for SHA-256 95bcdcef7a814bd6…

MALICIOUS

PDF

42.8 KB Created: 2020-07-10 00:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: 6108b428c45ce0199da5b433e411f0b7 SHA-1: 322e81fc9a9070e58af80c8000a753a05d6dd6a0 SHA-256: 95bcdcef7a814bd6966ad2cee501d9a1a627cc720896bf0945c6b31f2300dbcb
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary redirector URL is https://ttraff.cc/wb?keyword=manual%20hot%20foil%20printing%20machine, which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a link farm or SEO spam campaign designed to drive traffic to malicious sites. No scripts were extracted from this sample.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=manual%20hot%20foil%20printing%20machine In PDF document text
    • http://files.marquettecd.com/uploads/1/3/1/6/131636728/5634f4.pdfIn PDF document text
    • http://files.mobilecitynz.net/uploads/1/3/1/8/131871829/0b894734.pdfIn PDF document text
    • http://files.justbcosmetics.com/uploads/1/3/1/6/131636665/7188013.pdfIn PDF document text
    • http://files.asacottrelldar.org/uploads/1/3/1/3/131398066/29d3d713096556f.pdfIn PDF document text
    • http://files.matthewarcher.net/uploads/1/3/1/6/131607777/5af999d85ea.pdfIn PDF document text
    • http://files.agentcprojects.com/uploads/1/3/1/8/131872015/sekujojo.pdfIn PDF document text
    • http://files.thorntongreg.com/uploads/1/3/1/1/131163851/luxijapiduv.pdfIn PDF document text
    • http://files.getitwright.com/uploads/1/3/0/7/130776788/pufim-fafopunatobi.pdfIn PDF document text
    • http://files.kmphotographyma.com/uploads/1/3/1/4/131407165/1126974.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://takipeximon.files.wordpress.com/2020/06/91154443232.pdfIn PDF document text
    • https://guvobazub.files.wordpress.com/2020/06/14807647318.pdfIn PDF document text
    • https://jilijufupe.files.wordpress.com/2020/07/68153952248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dokole.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A05 5140 bytes
SHA-256: 799184e82939f0710c4cc00815ba4420b8d6c3173d1313efbee70c6371064077
font_01_sfnt_off00007b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B54 10296 bytes
SHA-256: 58af768646f93043443092a92821a4da0af6300a0bf6e7f73e58f6eadb97f486

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