Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd76a265f81f9c0…

MALICIOUS

PDF

38.4 KB Created: 2020-11-05 10:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6421342102b06af257de261b34d5b41f SHA-1: 5e1373593df9d295de9a2f3ceed0ad1c639f97dd SHA-256: 9dd76a265f81f9c0adc0945dc90248043583eafba485aa095fffb99d4c11b5af
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised as a service manual. The ML classifier strongly indicated maliciousness, and the embedded URL is a primary indicator of a phishing or redirection attempt. No scripts were extracted, but the presence of a malicious URL suggests the document is intended to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/123?keyword=1999+camry+factory+service+manual
    • https://kexinebig.weebly.com/uploads/1/3/4/3/134338338/4238890.pdf
    • https://cdn-cms.f-static.net/uploads/4450424/normal_5f9ebc1a3eb8d.pdf
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/8807337.pdf
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f8cfcc3d0d0a.pdf
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5f87706b5fdfc.pdf
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/9898268.pdf
    • https://cdn-cms.f-static.net/uploads/4370307/normal_5f89f9dfe8a01.pdf
    • https://cdn-cms.f-static.net/uploads/4411493/normal_5f9a5e17aea36.pdf
    • https://cdn-cms.f-static.net/uploads/4412894/normal_5fa3ada037c7c.pdf
    • https://jivoxafur.weebly.com/uploads/1/3/4/3/134382284/3308919.pdf
    • https://jifefovemerozix.weebly.com/uploads/1/3/4/4/134444698/zikidupibidanoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ed8c07b9-5294-4bae-8789-06264361c2f9/34702044918.pdf
    • https://uploads.strikinglycdn.com/files/9b155c22-9028-4cfb-82d7-99ace1878863/xaximeluletinewif.pdf
    • https://uploads.strikinglycdn.com/files/5612a169-f731-4d6e-975b-7e7210a83f6c/93353040796.pdf
    • https://uploads.strikinglycdn.com/files/0d6f6835-fdf7-4fd5-a32f-dcd628e97dd4/lumugukamizazu.pdf
    • https://cdn.shopify.com/s/files/1/0505/4929/3214/files/cya_basketball_travel.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005393.bin
9991d710ab6d3018779a4e2cd55cff7913c74801b75fdcf9ad0820366c40d947
pdf-font-stream PDF embedded font (sfnt) at offset 0x5393 5304 bytes
font_01_sfnt_off0000659b.bin
9a58711788c96ada204f15024c001038e6e2f78d2d1afbd83757607d8bfeaf93
pdf-font-stream PDF embedded font (sfnt) at offset 0x659B 12404 bytes