Malicious PDF — malware analysis report

Static analysis result for SHA-256 e077a709ed2424b0…

MALICIOUS

PDF

35.3 KB Created: 2020-07-08 15:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 3f5ac1127de06959012338dab888840d SHA-1: 69900205356a1282d24fdc918b46378ce7fa178b SHA-256: e077a709ed2424b00f10b0b9a3d1672118856bf1fbc5ff32df18bf88da5eb875
184 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many of which point to a link farm designed for SEO manipulation. One prominent link redirects to a known malicious URL, suggesting a phishing or malware distribution attempt. The document body contains garbled text but includes the target URL, reinforcing the malicious intent.

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=acca%20paper%20f1%20accountant%20in%20business%20pdf In PDF document text
    • http://files.blog.saradeckard.com/uploads/1/3/2/6/132695572/1108863.pdfIn PDF document text
    • http://files.livingatthedistillery.com/uploads/1/3/1/8/131856518/kelopiwo_kijebumuzor_zakinijewegekis.pdfIn PDF document text
    • http://files.dearborn411.com/uploads/1/3/2/7/132740860/xokagilo.pdfIn PDF document text
    • http://files.lknailsandbeauty.co.uk/uploads/1/3/2/6/132681938/wovaxale.pdfIn PDF document text
    • http://files.unwrappingstress.com/uploads/1/3/1/3/131398134/3639002.pdfIn PDF document text
    • http://files.908sown.com/uploads/1/3/0/7/130739658/1aced2e326.pdfIn PDF document text
    • http://files.5ivezero.com/uploads/1/3/1/4/131437538/boxuzuzege-jamov-susaxozokusonir.pdfIn PDF document text
    • http://files.proyecto1867.com/uploads/1/3/2/3/132302913/mozolejemi-vexiramiga-leselu.pdfIn PDF document text
    • http://files.christinebrumbaughdesign.com/uploads/1/3/1/4/131407898/lutojosu_gadizuzin_lebejirotivipi_gosagugukomavu.pdfIn PDF document text
    • http://files.oceansedgeediting.com/uploads/1/3/0/9/130969503/dojitosoxaposud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://medafelenuj.files.wordpress.com/2020/07/jegukufinakubefejob.pdfIn PDF document text
    • https://zixator.files.wordpress.com/2020/06/fegigove.pdfIn PDF document text
    • https://migapilib.files.wordpress.com/2020/06/81918924155.pdfIn PDF document text
    • https://zodokujuxo748596736.files.wordpress.com/2020/06/87506169573.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_off00004d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D98 5180 bytes
SHA-256: d5d9da4d1283dc7ab744d8c49ff1495cf99bcf3bc98d8abdd1064dbb1c50c525
font_01_sfnt_off00005f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F37 9700 bytes
SHA-256: d3f27a7f8409c602e570e6f70549acb83fe15119ca8d36c02e8a29cb8b0d7739

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