Malicious PDF — malware analysis report

Static analysis result for SHA-256 40958c072c540a77…

MALICIOUS

PDF

36.1 KB Created: 2020-07-10 04:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: fecc3e635a256f5a5be5030cbde485db SHA-1: 6ce1e29e9c03747ec71e016b57a63ec3d49d0eb5 SHA-256: 40958c072c540a775e73e1e9807f83b4f8bd0928b16142fb06d319f9616f770e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a deceptive title and numerous links, many of which point to a link farm designed to host further malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://ttraff.cc/wb?keyword=honeywell%20notifier%20nfs-320%20manual`. The document body, though partially corrupted, also contains this URL and other PDF links, reinforcing the lure. The presence of multiple PDF links suggests a strategy to distribute malicious content or redirect users to phishing sites.

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=honeywell%20notifier%20nfs-320%20manual In PDF document text
    • http://files.juliacrist.com/uploads/1/3/0/7/130739375/ditibubogudu.pdfIn PDF document text
    • http://files.guyingram.com/uploads/1/3/2/6/132681596/3295852.pdfIn PDF document text
    • http://files.bbluntsheabutter.shop/uploads/1/3/1/3/131383018/bajof.pdfIn PDF document text
    • http://files.lightningridgerealestate.com.au/uploads/1/3/2/8/132815961/tuwor.pdfIn PDF document text
    • http://files.meverettart.com/uploads/1/3/1/4/131438571/97984eb0385b8.pdfIn PDF document text
    • http://files.chicagosanon.org/uploads/1/3/0/8/130814104/6620f3f3.pdfIn PDF document text
    • http://files.pvtennisclub.com/uploads/1/3/0/8/130873944/sefok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://keligimeb128609187.files.wordpress.com/2020/06/vavuvobuj.pdfIn PDF document text
    • https://zuwiseripos.files.wordpress.com/2020/07/wimaxulazut.pdfIn PDF document text
    • https://zunenotekabe.files.wordpress.com/2020/06/12891370664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6733015585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30740110423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39646295774.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_off00004fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDD 5420 bytes
SHA-256: 9cd8cf827fd13a6a22e85b4f65822d7b3489b9810c79e34d1d72ba58fee4bcf0
font_01_sfnt_off00006240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6240 9836 bytes
SHA-256: db1e1b8ede6138755e5c98d5041b1a92756ecc1f312511e63afb5358c7c7e80d

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