Malicious PDF — malware analysis report

Static analysis result for SHA-256 40047f4b82225a36…

MALICIOUS

PDF

52.7 KB Created: 2020-07-08 19:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 54b8dec95bd3d25c67b8035e909b4594 SHA-1: 30f13efbb319ec3ddebd117b9bb4195c78a2a201 SHA-256: 40047f4b82225a36db51005382643ee59d682c2f4421b7411a95c52997be98da
184 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.com/wb?keyword=after%20school%20program%20schedule%20pdf'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a mass of external PDF links, including 'http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdf'. The document body, though heavily obfuscated, contains text related to 'after school program schedule pdf', suggesting a social engineering lure.

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.com/wb?keyword=after%20school%20program%20schedule%20pdf In PDF document text
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdfIn PDF document text
    • http://files.handmadebylouisa.com/uploads/1/3/0/7/130775827/25f7f89e987e0.pdfIn PDF document text
    • http://files.epsteinbarrvirusnaturalhealth.com/uploads/1/3/0/7/130738821/5100723.pdfIn PDF document text
    • http://files.hunterandersonrichmond.com/uploads/1/3/2/6/132683088/6f08def95a7b36.pdfIn PDF document text
    • http://files.smartrecruitment.com/uploads/1/3/1/6/131606231/1025580.pdfIn PDF document text
    • http://files.kaybethavery.com/uploads/1/3/1/4/131454272/dabilu.pdfIn PDF document text
    • http://files.becomingsarh.com/uploads/1/3/0/7/130739567/3400932.pdfIn PDF document text
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdfIn PDF document text
    • http://files.cateringandcreations.net/uploads/1/3/0/8/130814513/9295549.pdfIn PDF document text
    • http://files.mrckc.org/uploads/1/3/1/8/131856624/matamawov_gitabunijak_xuzed.pdfIn PDF document text
    • http://files.jmn-i.com/uploads/1/3/0/8/130814642/badegumun-vafadivo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vinuvifu.files.wordpress.com/2020/06/xasexavojisifizo.pdfIn PDF document text
    • https://vakaximez.files.wordpress.com/2020/06/kaxerobavumamimaveg.pdfIn PDF document text
    • https://fijimisu.files.wordpress.com/2020/06/gided.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.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_off0000917b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917B 5288 bytes
SHA-256: 7643b7a6c35190755c2f9693db0986b39af65c55fc201d6f324a0f576885cd5e
font_01_sfnt_off0000a37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA37D 10088 bytes
SHA-256: 2b004a66658b06898234352d03e0b1f757b770b670fb3148cc36add75a75ff50

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