Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70d7986665adf8a…

MALICIOUS

PDF

39.7 KB Created: 2020-10-16 15:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9d1077f98edc8af62ba4194b0ddb29e1 SHA-1: d463401bd5a7fc13ba5ed5d6d49c6209977e432e SHA-256: e70d7986665adf8a31a1fcd0944a6a0382a7eb32d3e58d474f6b18bf77cd2557
182 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to disposable hosting services and known redirector infrastructure. The primary URL, https://cctraff.ru/123?keyword=coordinate+geometry+worksheets+grade+10, is flagged as a malicious redirector. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • 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://cctraff.ru/123?keyword=coordinate+geometry+worksheets+grade+10 In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/cb443bd2.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/0bb9c02eeaab6a2.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/7229121.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/5117028.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/992906f9cc0.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/lipomemupixop.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bf4458.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/jimub.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/dalofa-kanezawarejosu-kasifawi.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/pabajab-xujojet-dizuk.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/kufadizurexogi.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/4a9ea.pdfIn PDF document text
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/360d37ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/83703d6a-c6c6-46a4-bbec-14b0e6934d44/78131608546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adf4639b-e8a1-48c9-919e-290ab12dfb67/pebebel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/7076/7271/files/gereperogodagojowapoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/xosogirujulatuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8309/4934/files/nerf_super_soaker_hydro_cannon_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3374/1480/files/46825507301.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000845a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x845A 5564 bytes
SHA-256: 1278a3e13ee94a241eb017fcf91ec843cb1d767f19e442bcf859a64867289d0f

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